JP2016225266A - LED lamp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an LED lamp.SOLUTION: The LED lamp according to the embodiment of the present invention, comprises: a light source part including at least one LED; and a light source driving part which is connected to the light source part, is connected to a commercial AC power supply and a magnetic type or an electronic type stabilizer for a fluorescent lamp, converts an applied AC power source applied thereto into a DC power source, and drives at least one LED by applying the power source to the light source part. The light source driving part includes: a power source terminal part which can be connected to or disconnected from the commercial AC power supply, and the magnetic type or the electronic type stabilizer; a rectification part which is connected to the power source terminal part and rectifies the AC power source applied through the power source terminal; a filter part which smooths the power source outputted from the rectification part, converts it to the DC power source, and applies it to the light source part; and a constant current control part which is connected to the light source part, is operated by the application of a remaining power source voltage consumed by at least one LED of the DC power source applied to a high power source voltage terminal of the light source part, through a low power source terminal of the light source part, and allows the constant current to be flowed in at least one LED.SELECTED DRAWING: Figure 5

Description

  The present invention relates to an LED lamp (Light Emitting Diode Lamp), and more specifically, an LED lamp that can be used by directly connecting to a magnetic ballast, an electronic ballast, or an AC power source used for lighting a fluorescent lamp. About.

  A fluorescent lamp is a lamp that illuminates by putting mercury and argon gas in a vacuum glass tube and applying fluorescent paint on the inner wall to convert the ultraviolet rays generated by the mercury discharge into visible light. is there.

  Such fluorescent lamp lighting methods include a magnetic lighting method using a separate starter (Glow Starter or Rapid Starter) and a magnetic ballast, and an electronic lighting method using an electronic ballast. The electronic ballast smoothes the commercial AC power source to direct current using electronic components, and then converts to a high frequency of 20 [KHz] to 30 [KHz] using a high frequency inverter circuit and outputs the result.

  Electronic ballasts are again classified into self-excited and separately-excited types according to the oscillation method for high frequency. The self-excited type uses an internal inductor and capacitor, and has a disadvantage that the circuit is simple but somewhat unstable.

  However, fluorescent lamps are used as various forms of lighting for lighting and interiors, but have a problem that the brightness desired by the user cannot be realized as compared with power consumption.

  As a result, recently, LED lamps capable of realizing energy saving and clear illumination have been spotlighted, and the range of use has been expanded as various types of lighting fixtures, and attempts to replace fluorescent lamps have been made. It is made active.

  An LED lamp is a lighting device that uses an LED, which is an element that emits light when a current is applied. The LED is driven at a low voltage, and has advantages such as long life, low power consumption, fast response speed, strong impact resistance, and can be reduced in size and weight as compared with other lighting devices. LED lamps are used with drive circuits that convert commercial AC power into rated DC power for LED operation. Attempts are actively made to replace such LED lamps with fluorescent lamps.

  However, since the LED lamp is operated by a DC power source and is turned on by a method different from the lighting method of the fluorescent lamp, unlike a fluorescent lamp operated by an AC power source, a ballast ( Magnetic ballasts or electronic ballasts) are not used directly connected. This is because the magnetic ballast and the electronic ballast basically convert the commercial 60 Hz AC power source into a high frequency of several tens of KHz and provide it to the LED lamp. In addition, since the self-excited ballast, which is a kind of electronic ballast, does not use a separate integrated circuit chip for controlling the output, the output voltage is 100 [V] to 1000 [V] depending on the load applied to the secondary side. ] Have instabilities that change between.

  Thus, if the LED lamp is directly connected to a ballast (magnetic ballast or electronic ballast), the LED lamp cannot correctly handle the high frequency and voltage of the ballast. This causes problems such as the LED lamp not operating normally or being destroyed.

  Eventually, in order to use an LED lamp instead of a fluorescent lamp, both the ballast or the starter used for lighting the fluorescent lamp must be removed, and the troublesomeness of installing the LED converter occurs. Moreover, the problem that the cost by installation of an LED converter will increase arises.

  Patent Document 1 is a prior document related to the present invention.

Korean Registered Patent No. 10-1400369 (Registration Date: May 21, 2014)

  In order to solve the above problems, the problem to be solved by the present invention is not to classify a magnetic ballast or an electronic ballast used for lighting a fluorescent lamp. It is an object of the present invention to provide an LED lamp that can be used by being directly connected to an electronic ballast, and can also be used by being directly connected to an AC power source.

  The solution of the present invention is not limited to the above-described solution, and other solutions that are not mentioned will be clearly understood by those skilled in the art from the following description.

  An LED lamp according to an aspect of the present invention is connected to a light source unit including at least one LED, the light source unit, a commercial AC power source, a magnetic or electronic ballast for a fluorescent lamp, and applied thereto. A light source driving unit that converts an AC power source into a DC power source and applies this to a light source unit to drive at least one LED. The light source driving unit includes the commercial AC power source, magnetic type, or electronic type A power supply terminal unit that can be connected to or disconnected from the ballast, a rectification unit that is connected to the power supply terminal unit and rectifies an AC power applied through the power supply terminal unit, and a power source output from the rectification unit is smoothed A filter unit that converts the DC power source and applies the same to the light source unit; and at least one of the DC power sources connected to the light source unit and applied to a high power source voltage terminal of the light source unit. The remaining power supply voltage after being consumed by LED, and operation is applied through a low power supply voltage terminal of the light source unit includes a constant current control unit to make the constant current flows in at least one the LED.

  The power terminal portion may include an electronic device having a filament resistance value of the fluorescent lamp.

  The electronic device may be a positive temperature thermistor whose electrical resistance increases as the temperature rises.

  The constant current controller may include at least two inductors that are connected to the at least one LED and remove ripple current included in the current flowing through the at least one LED.

  The at least two inductors may be connected in series, and the inductor connected to the at least one LED closest to the at least one inductor may have the largest inductance.

  The constant current control unit includes at least one resistor, and the low power supply voltage of the light source unit is consumed by the at least one resistor so that a constant current flows through the at least one LED.

  An LED lamp according to another aspect of the present invention is connected to a light source unit including at least one LED, the light source unit, and connected to a commercial AC power source, a magnetic or electronic ballast for a fluorescent lamp, respectively. A light source driving unit that converts the AC power source to be converted into a DC power source and applies this to the light source unit to drive at least one LED, and the light source driving unit includes the magnetic or electronic ballast. A first connection terminal portion or a first power supply terminal portion that can be connected to or disconnected from any one of the first power supply terminal and the second power supply terminal of the commercial AC power supply, and the magnetic or electronic ballast Of the second connection terminal part or the first power supply terminal and the second power supply terminal of the commercial AC power supply, the second power supply terminal part that can be connected to or disconnected from the rest, and the first power supply terminal part, 1 Through the power terminal A first rectifying unit that rectifies an applied AC power supply; a second rectifying unit that is connected to the second power supply terminal unit and rectifies the AC power applied through the second power supply terminal unit; and the first rectifying unit. And the second rectifier unit smoothes the power source, converts it to the DC power source, applies this to the light source unit, and is connected to the light source unit, and the high power source voltage terminal of the light source unit The remaining power supply voltage after being consumed by the at least one LED is applied through the low power supply voltage terminal of the light source unit, and the constant current is applied to the at least one LED. And a constant current control unit configured to flow.

  The first power supply terminal unit may include a first electronic element having a filament resistance value of the fluorescent lamp, and the second power supply terminal unit may include a second electronic element having a filament resistance value of the fluorescent lamp.

  The first electronic element and the second electronic element may be positive temperature coefficient thermistors that increase in electrical resistance as the temperature rises.

  The constant current control unit may include at least two inductors that are connected to the at least one LED and remove a pulsating current included in a current flowing through the at least one LED.

  According to the LED lamp according to the embodiment of the present invention, the magnetic ballast or the electronic ballast used for lighting the fluorescent lamp is not divided, and is directly connected to the magnetic ballast or the electronic ballast. Accordingly, in order to use the LED lamp instead of the fluorescent lamp, the user does not need to install a separate LED converter by removing the ballast or starter for the fluorescent lamp.

  In addition, even if the lighting method, type, and installation method of a fluorescent ballast are not known, the LED lamp according to the embodiment of the present invention is simply used as an AC power source, a magnetic ballast for a fluorescent lamp, or an electronic ballast. Anyone, including children and elderly people, can easily replace fluorescent lamps with LED lamps.

It is drawing which shows a magnetic fluorescent lamp system. It is drawing which shows an electronic fluorescent lamp system. 1 is a diagram illustrating an illumination system in which an LED lamp according to an embodiment of the present invention is used. 3 is a diagram illustrating a connection example in which an LED lamp according to an embodiment of the present invention is connected to a commercial AC power source. It is a circuit block diagram of the LED lamp by embodiment of this invention. 1 is a diagram illustrating a configuration of a light source unit according to an embodiment of the present invention.

  Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

  Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the invention to those skilled in the art. It is not limited to the embodiment. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the invention to those skilled in the art.

  The terminology used herein is for the purpose of describing particular embodiments and is not intended to be limiting of the invention. As used herein, the singular form may include a plurality of forms unless the context clearly indicates otherwise. Also, as used herein, “comprise” and / or “comprising” identifies the presence of a referenced shape, number, step, action, member, element, and / or group thereof. And does not exclude the presence or addition of one or more other shapes, numbers, actions, members, elements and / or groups. As used herein, the term “and / or” includes any and all combinations of one or more of the listed items.

  In the present specification, terms such as first and second are used to describe various members, regions, and / or parts, but these members, parts, regions, layers, and / or parts are limited by these terms. It is self-evident that it must not be done. These terms do not imply a particular order, top or bottom, or superiority, and are only used to distinguish one member, region or part from another member, region or part. Therefore, hereinafter, the first member, region or part described above can refer to the second member, region or part without departing from the teaching of the present invention.

  Embodiments of the invention will now be described with reference to the drawings, which schematically illustrate embodiments of the invention. In the drawings, deformations of the indicated shapes are expected, for example, due to manufacturing techniques and / or tolerances. Thus, embodiments of the present invention should not be construed as limited to the particular shapes of regions illustrated herein but must include, for example, manufacturing-induced shape changes.

  An LED lamp according to an embodiment of the present invention is a lighting device that is connected to a commercial AC power supply, a magnetic ballast for fluorescent lamps, or an electronic ballast and operates stably. As long as it is connected to the magnetic ballast or the electronic ballast in this way, the LED lamp according to the embodiment of the present invention can be operated stably by the user in order to use the LED lamp instead of the fluorescent lamp. Eliminates the ballast or starter for fluorescent lamps and does not require a separate LED converter. In addition, the LED lamp according to the embodiment of the present invention operates stably even when connected to a commercial AC power source.

  Therefore, even if the lighting method, type, and installation method of the ballast for the fluorescent lamp are not known, or the output voltage of the commercial AC power source is not known, the technical idea of the LED lamp according to the embodiment of the present invention is simply used. The LED lamp that is actually commercialized can be operated simply by plugging it into a magnetic ballast or electronic ballast for fluorescent lamps, or by connecting it to a commercial AC power supply, including children, elderly people, etc. Anyone can easily replace the fluorescent lamp with the LED lamp, and the LED lamp can be operated.

  Before describing an LED lamp according to an embodiment of the present invention, a magnetic ballast and an electronic ballast will be described.

  FIG. 1 is a drawing showing a magnetic fluorescent lamp system of a magnetic lighting system, and FIG. 2 is a drawing showing an electronic fluorescent lamp system of an electronic lighting system. The magnetic fluorescent lamp system 100 and the electronic fluorescent lamp system 200 include a first connection terminal 203 and a second connection terminal 205 for connecting to a fluorescent lamp.

  In the case of the magnetic fluorescent lamp system 100 shown in FIG. 1, the AC power supply forms a closed circuit connected to the other end of the fluorescent lamp 10 through the magnetic ballast 101, one end of the fluorescent lamp 10, and the starter 103. The fluorescent lamp 10 is turned on by the operation of the starter 103. In the case of the electronic fluorescent lamp system 200 shown in FIG. 2, AC power is supplied to the fluorescent lamp 10 from the electronic ballast 201 through the first connection terminal 203, the second connection terminal 205, or both terminals 203, 205. The

  Examples of LED lamps connected to the magnetic ballast shown in FIG. 1 or the electronic ballast shown in FIG. 2 and driven by being supplied with AC power output from each ballast are shown. FIG. 3 shows an example of connecting the LED lamp according to the embodiment of the present invention to a commercial AC power source. FIG. 4 shows a configuration circuit diagram of the LED lamp according to the embodiment of the present invention. An example of a light source unit constituting an LED lamp according to an embodiment of the present invention is shown in FIG.

  Referring to FIG. 3, an LED lamp 700 according to an embodiment of the present invention is illustrated as being connected to an electronic fluorescent lamp system 200. Although not limited to this, the LED lamp 700 is not shown in FIG. 3, but is connected to a magnetic fluorescent lamp system using a magnetic ballast and a starter (Glow Starter or Rapid Starter). There is also.

  Meanwhile, referring to FIG. 4, an LED lamp 700 according to an embodiment of the present invention is connected to a commercial AC power supply AC300 to operate. At this time, one electrode of the first power supply terminal portion 502 of the LED lamp 700 is connected to the first power supply terminal 301 of the commercial AC power supply 300, and the second power supply terminal 302 of the commercial AC power supply 300 is connected to the LED. One electrode of the second power terminal portion 506 of the lamp 700 is shown to be connected. However, the present invention is not limited to such connection, and the first power supply terminal 301 and the second power supply terminal 302 of the commercial AC power supply 300 are connected only to the electrode of the first power supply terminal portion 502 of the LED lamp 700, or the LED lamp Only the electrode of the second power supply terminal portion 506 of 700 is connected. For example, the first electrode AC1 of the first power supply terminal unit 502 is connected to the first power supply terminal 301 of the commercial AC power supply 300, and is connected to the second electrode AC2 of the second power supply terminal 302 of the commercial AC power supply 300.

  As shown in FIG. 4, the reason why the LED lamp 700 according to the embodiment of the present invention is connected to the commercial AC power supply 300 without the polarity classification of the commercial AC power supply 300 is that the magnetic ballast or the electronic ballast is aged. This is because the LED lamp 700 can be operated stably even without a magnetic ballast or an electronic ballast in preparation for a case where it is broken down.

  Hereinafter, an embodiment in which the LED lamp 700 is connected to the electronic fluorescent lamp system 200 shown in FIG. 3 will be mainly described.

  Referring to FIG. 5, an LED lamp 700 according to an embodiment of the present invention includes a light source unit 600 including at least one LED and an AC power source connected to the light source unit 600 and applied from a magnetic or electronic ballast. A light source driving unit 500 that converts the power into a direct current power source and applies it to the light source unit 600 to drive at least one LED.

  The light source unit 600 includes at least one LED. Such at least one LED is connected in series, in parallel, or in series and in parallel. As an example, FIG. 6 illustrates that the light source unit 600 includes 108 LEDs. The light source unit 600 shown in FIG. 6 includes 18 LED units in which 6 LEDs are connected in parallel, and the 18 LED units have a structure connected in series. Therefore, the light source unit 600 includes a total of 108 LEDs.

  The light source driver 500 includes a first power terminal 502, a second power terminal 506, a first rectifier 510, a second rectifier 512, a filter 514, and a constant current controller 516.

  The first power supply terminal portion 502 includes a first power supply terminal 504 having a first electrode AC1 and a second electrode AC2, and the first connection terminal of the magnetic ballast 101 or the electronic ballast 201 through the first power supply terminal 504. 203 is connected or disconnected. The second power supply terminal unit 506 includes a second power supply terminal 508 having a third electrode AC3 and a fourth electrode AC4, and the second connection terminal of the magnetic ballast 101 or the electronic ballast 201 through the second power supply terminal 508. Connected to or disconnected from 205. At this time, the first to fourth electrodes AC1 to AC4 are in the form of electrodes exposed in parallel so as to be connectable to the first connection terminal 203 and the second connection terminal 205. Although the LED lamp 700 according to the embodiment of the present invention shown in FIG. 4 is shown as a linear cylindrical matrix, it is not limited thereto.

  Further, the first power supply terminal unit 502 may further include a first electronic device R1 connected in parallel to the first power supply terminal 504. The first electronic element R1 has a filament resistance value of the fluorescent lamp 10, for example, a value of 3 [Ω], and can be embodied as a positive temperature coefficient thermistor that increases in electrical resistance as the temperature rises. Similarly, the second power supply terminal unit 506 may further include a second electronic element R2 connected in parallel to the second power supply terminal 508. This second electronic element R2 has a filament resistance value of the fluorescent lamp 10, for example, a value of 3 [Ω], and can be embodied as a positive temperature coefficient thermistor whose electrical resistance increases as the temperature rises.

  As described above, the first electronic element R1 and the second electronic element R2 that are positive characteristic thermistors having the same resistance value as the filament resistance value of the fluorescent lamp 10 are provided on the first power supply terminal portion 502 and the second power supply terminal portion 506, respectively. The first reason is that the electronic ballast 201 recognizes the LED lamp 700 connected to the first connection terminal 203 and the second connection terminal 205 as the fluorescent lamp 10. That is, since the LED lamp 700 includes the first electronic element R1 and the second electronic element R2 having the same resistance value as the filament resistance value of the fluorescent lamp 10, the electronic ballast 201 includes the first connection terminal 203 and the second connection. The LED lamp 700 connected to the terminal 205 is recognized as the fluorescent lamp 10 and an AC power supply is output to the LED lamp 700.

  After all, the LED lamp 700 according to the embodiment of the present invention includes the first electronic terminal R1 and the second electronic element R2 having a resistance value such as the filament resistance value of the fluorescent lamp 10, and thus the first connection terminal 203 and the first electronic element R2. When the electronic ballast 201 is connected to the electronic ballast 201 through the two connection terminals 205, the electronic ballast 201 can thoroughly recognize the LED lamp 700 connected to the load as the fluorescent lamp 10. As a result, the electronic ballast 201 supplies normal AC power to the LED lamp 700 through the first connection terminal 203 and the second connection terminal 205. Therefore, the LED lamp 700 operates normally by the AC power supplied from the electronic ballast 201.

  If a material having no filament resistance value of the fluorescent lamp 10, such as a wire, is inserted into the first connection terminal 203 and the second connection terminal 205 of the electronic ballast 201, the electronic ballast 201 is When the resistance value of the substance is sensed and the resistance value of the substance is not the same as the filament resistance value of the fluorescent lamp 10, no AC power is output. Similarly, when the resistance values of the first electronic element R1 and the second electronic element R2 of the LED lamp 700 are different from the filament resistance value of the fluorescent lamp 10, the electronic ballast 201 does not supply AC power to the LED lamp 700. . Thereby, since the LED lamp 700 is not supplied with AC power from the electronic ballast 201, it does not operate normally.

  Now, the first power supply terminal portion 502 and the second power supply terminal portion 506 are provided with a first electronic element R1 and a second electronic element R2 that are positive characteristic thermistors having the same resistance value as the filament resistance value of the fluorescent lamp 10. The reason of 2 is demonstrated.

  The first electronic element R1 and the second electronic element R2 have resistance values that increase with temperature and have resistance values such as the filament resistance value of the fluorescent lamp 10. However, even if an AC power supply is applied, the first electronic element R1 and the second electronic element R2 are short-circuited. This is because (short) is not performed. In contrast, when the first electronic element R1 and the second electronic element R2 are embodied as resistors that are not positive thermistors, the first electronic element R1 embodied as a resistor is applied when an AC power supply is applied. The second electronic element R2 is short-circuited. As a result, the light source driving unit 500 is destroyed, and further, not only the light source driving unit 500 but also the light source unit 600 including at least one LED is destroyed.

  Further, the first power supply terminal unit 502 further includes a first fuse F1 connected in series to the first electrode AC1 to which an AC power supply is applied, and can protect a subsequent circuit from an overvoltage or overcurrent AC power supply. Similarly, the second power supply terminal unit 506 further includes a second fuse F2 connected in series to the third electrode AC3 to which an AC power supply is applied, and can protect a subsequent circuit from an overvoltage or overcurrent AC power supply.

  The AC power supply input from the magnetic ballast 101 or the electronic ballast 201 is the first electrode AC1, the second electrode AC2, the third electrode AC3, the fourth electrode AC4, the first electrode AC1, the third electrode AC3, the first electrode. The first electrode AC1, the second electrode AC2, the third electrode AC3, the second electrode AC2, the third electrode AC3, or the second electrode AC2, the fourth electrode AC4, and the third electrode AC3. In addition, it may be performed through both sides of the fourth electrode AC4.

  Referring to FIG. 5 again, the first rectification unit 510 is connected to the first power supply terminal unit 502 and performs full wave rectification on the AC power applied through the first power supply terminal unit 502 to a filter unit. Output to 514. The first rectifying unit 510 includes bridge diode circuits D1, D2, D3, and D4, and includes capacitors C1 and C2 for removing harmonic pulsating currents included in the outputs of the bridge diode circuits D1, D2, D3, and D4. In addition, the reverse voltage power supply includes reverse voltage protection protection diodes D5 and D6 for preventing inflow into the bridge diode circuits D1, D2, D3, and D4.

  Similarly, the second rectification unit 512 is connected to the second power supply terminal unit 506, and full-wave rectifies the AC power applied through the second power supply terminal unit 506 and outputs it to the filter unit 514. The second rectification unit 512 includes bridge diode circuits D7, D8, D9, and D10, and includes capacitors C3 and C4 for removing harmonic pulsating currents included in the outputs of the bridge diode circuits D7, D8, D9, and D10. The reverse voltage power source includes reverse voltage protection protection diodes D11 and D12 for preventing inflow into the bridge diode circuits D7, D8, D9 and D10.

  At this time, when the LED lamp 700 is connected to the magnetic fluorescent lamp system 100 shown in FIG. 1, AC power is input through the first electrode AC1 and the third electrode AC3, and the starter 103 does not operate. A closed circuit through the starter 103 is not formed. In this case, the path of the AC power supply is through the forward diodes D1 and D2 of the first rectifier 510, the capacitor C1 and the diode D5, and the forward diodes D8 and D7 of the second rectifier 512 and the capacitor C3 and the diode D11. Are input to the filter unit 514. Accordingly, the LED lamp 700 can be operated regardless of whether the starter 103 shown in FIG. 1 is operating.

  In other words, even if an external AC power is input through one of the two electrodes of the first power supply terminal 504 and one of the two electrodes of the second power supply terminal 508, the bridge of the first rectifying unit 510 is used. Of the diodes included in the diode circuits D1, D2, D3, D4 and the bridge diode circuits D7, D8, D9, D10 of the second rectifier 512, four form a new combination of bridge diode circuits.

  For use in the magnetic fluorescent lamp system 100 shown in FIG. 1, the bridge diode circuits D1, D2, D3, D4 of the first rectifier unit 510 and the bridge diode circuits D7, D8 of the second rectifier unit 512 are additionally provided. , D9, and D10 must have a combination of the same shape (diode connection direction) with respect to each of the first power supply terminal portion 502 and the second power supply terminal portion 506. If they are different, the first power supply terminal 504 is immediately connected to the second power supply terminal 508 via the first rectification unit 510 and the second rectification unit 512, and power is not supplied to the filter unit 514 corresponding to the load.

  When the AC power is input through the first electrode AC1 and the second electrode AC2, or input through the third electrode AC3 and the fourth electrode AC4, the first rectification unit 510 or the second rectification unit 512 is naturally used. The full-wave rectified voltage power supply is output to the filter unit 514.

  The bridge diode circuits D1, D2, D3, and D4 and the bridge diode circuits D7, D8, D9, and D10 have an AC frequency that reaches several hundred times that of the commercial power source output from the electronic ballast 210 shown in FIG. It can be implemented using a high frequency diode for processing the power supply.

  The filter unit 514 smoothes the power output from the first rectification unit 510 and the second rectification unit 512, converts the power into a DC power source, and applies this to the light source unit 600. The inductor L3 and the capacitors C5 and C6 , C11, and C12. The inductor L3 and the capacitors C5, C6, C11, and C12 are connected in parallel and serve as an LC filter.

  That is, it plays a role of removing the pulsating flow included in the power source output from the first rectifying unit 510 and the second rectifying unit 512. At this time, the capacitance of the capacitor C5 may have a larger value than the parallel connection capacitance of the capacitors C6, C11, and C12. The inductor L3 plays a role of preventing fine tremors of the power source output from the first rectification unit 510 and the second rectification unit 512, and is output from the first rectification unit 510 and the second rectification unit 512. It plays a role of reducing the size of the power source.

  The constant current control unit 516 is connected to the high voltage power supply terminal LED + and the low voltage power supply terminal LED− of the light source unit 600 and is applied to the high power supply voltage terminal LED + (DC power supply output from the filter unit 514). After the power is consumed by at least one LED, the remaining power is applied through the low power voltage terminal LED− to operate, so that a constant current flows through the at least one LED.

  Such a constant current control unit 516 includes a drive IC (U1) dedicated for pulse width modulation control, resistors R5, R6, R7, R8, R9, R10, R11, R12, R13, capacitors C7, C8, C9, C10, inductors L1, L2, diodes D13, D14, and a field effect transistor (Field Effect Transistor) Q1.

  The driving IC U1 is directly connected to the low power supply voltage terminal LED− of the light source unit 600, and operates by being directly applied with the remaining power through the low power supply voltage terminal LED−. This is a different system from the conventional one that uses a DC power supply applied to the high power supply voltage terminal LED + as the drive power supply of the drive IC (U1).

  As in the prior art, when the driving IC (U1) is driven using a DC power source applied from the high power supply voltage terminal LED +, the LED lamp 700 is normally connected to the load of the electronic ballast 201. When the AC power source of the electronic ballast 201 is converted into a DC power source and applied to the light source unit 600 and the driving IC (U1), the coupling impedance value by the power supply terminal VIN of the light source unit 600 and the driving IC (U1) However, a phenomenon in which the rated impedance value of the electronic ballast 201 becomes lower may occur.

  At this time, the rated impedance value of the electronic ballast 201 is determined after the LED ball 700 is recognized as the fluorescent lamp 10 by the electronic ballast 201 when initially connected to the electronic ballast 201 of the LED lamp 700. When the output AC power of the device 210 is converted into a DC power through the light source driver 500 and applied to the light source 600, the impedance of the light source 600 may be obtained.

  As described above, when the load of the electronic ballast 201 senses the coupling impedance value smaller than the rated impedance value, the electronic ballast 201 senses the rated impedance value of the load of the electronic ballast 201. When an AC power source is output, an AC power source that is larger than the output AC power source is output to a load, for example, the LED lamp 700, and it is determined that a problem has occurred in the load of the electronic ballast 201, such as a short circuit of the load. Thus, the output of the AC power supply can be interrupted to the load of the electronic ballast 201.

  As a result, the LED lamp 700 cannot be operated because the AC power cannot be supplied from the electronic ballast 201. In order to solve such a problem, in the embodiment of the present invention, the driving power source of the driving IC (U1) does not use a DC power source applied to the high power source voltage terminal LED + of the light source unit 600. The power source is directly connected to the low power supply voltage terminal LED− of the unit 600 so that the remaining power is directly applied through the low power supply voltage terminal LED−.

  As described above, the LED lamp 700 is connected to the load of the electronic ballast 201 by using a mechanism in which the driving power source of the driving IC (U1) is applied to the remaining power source through the low power source voltage terminal LED−. In this case, the load impedance value of the electronic ballast 201 is the rating value that is the impedance value of the light source unit 600 because the DC power applied to the light source unit 600 through the high power terminal LED + is not applied to the driving IC (U1). Impedance value.

  Therefore, the electronic ballast 201 senses that the impedance value of the LED lamp 700 connected to the load has the rated impedance value, and determines that there is no problem with the load, so that the AC power supply is normal for the load. Output to. Eventually, the LED lamp 700 operates normally when supplied with the AC power output normally from the electronic ballast 201.

  The driving IC (U1) senses the current flowing through the switch Q1 based on the result of comparing the CS terminal voltage, which is the voltage of the resistors R7, R8, R9, R10, and R11, with a predetermined reference voltage set inside, As a result, a pulse signal for controlling the gate terminal voltage of the field effect transistor Q1 is output through the GATE terminal. At this time, a duty ratio of the pulse signal may be determined by the resistor R6.

  The resistors R7, R8, R9, R10, and R11 are connected in parallel to the at least one LED by serving to consume the remaining power output from the low power supply voltage terminal LED− of the light source unit 600. Allow constant current to flow. For example, when the rated consumption voltage of at least one LED of the light source unit 600 is 64 [V] and the DC power supply voltage applied to the high power supply voltage terminal LED + of the light source unit 600 is 160 [V], Of the DC power supply voltage 160 [V], the remaining power supply voltage 104 [V] other than the power consumption voltage of the at least one LED must be consumed. Otherwise, at least one LED is applied with a DC power supply voltage greater than the rated consumption voltage through the high power supply voltage terminal LED +, but consumes the rated consumption voltage, but the remaining power supply voltage other than the rated consumption voltage. Cannot be consumed and will eventually be destroyed.

  In order to prevent such destruction of at least one LED, in an embodiment of the present invention, a resistor is connected to the constant current controller 516 to consume the merge power supply voltage that cannot be consumed by the at least one LED. R7, R8, R9, R10, R11 are provided. Through this, a constant current flows through at least one LED of the light source unit 600.

  The resistor R13 and the diode D14 connected to the gate terminal of the switch Q1 constitute a damping circuit that removes switching noise generated by the switching operation of the switch Q1. The capacitor C10 connected in parallel with the switch Q1 plays a role of suppressing switching noise generated by the switching operation of the switch Q1. In other words, the damping circuit formed by the combination of the resistor R13 and the diode D14 and the capacitor C10 are for removing the switching noise generated by the switching operation of the switch Q1 to the outside of the LED lamp 700. Through this, the peripheral electronic device of the LED lamp 700 can be operated normally without being affected by the switching noise generated in the LED lamp 700.

  The diode D13 prevents the direct current power applied to the high power supply voltage terminal LED + of the light source unit 600 from flowing directly into the drain terminal of the switch Q1, and is caused by the inflow of the direct current power applied to the high power supply voltage terminal LED +. It plays a role of preventing the destruction of the switch Q1.

  The capacitor C9 and the resistor R12 serve to remove noise or pulsating current included in the DC power supply applied to the high power supply voltage terminal LED + of the light source unit 600.

  The inductors L1 and L2 are connected in series with each other and serve to prevent the pulsating current included in the remaining power source output through the low power source voltage terminal LED− of the light source unit 600 from flowing into the switch Q1. That is, in other words. It plays the role of removing the pulsating flow contained in the remaining power source. The frequency of the pulsating flow included in the remaining power source may be twice the AC power source frequency output from the magnetic ballast 101 or the electronic ballast 201.

  This is because the frequency is doubled while the AC power source is full-wave rectified to the DC power source. For example, when the frequency of the AC power source output from the magnetic ballast 101 is 50 [Hz], when the AC power source is full-wave rectified, the frequency of the pulsating current included in the full-wave rectified power source is , 100 [Hz]. Such a pulsating flow eventually acts as a cause of occurrence of a flicker phenomenon that causes at least one LED of the light source unit 600 to blink according to the pulsating cycle. The flicker phenomenon in which the LED blinks according to the cycle of the pulsating flow is invisible to the human eye, but can be confirmed through camera photography and continuously affects the human brain. As a result, when the user is exposed to the flicker phenomenon for a long time, the user can be in a state of being very tired. Therefore, such a flicker phenomenon needs to be removed.

  In the prior art, a circuit having a complicated configuration is used in order to eliminate such a flicker phenomenon. However, in such a case, there is a problem in that the manufacturing cost and the volume of the LED lamp 700 are increased.

  Unlike the prior art, according to an embodiment of the present invention, the constant current control unit 516 of the LED lamp 700 includes at least two inductors connected to at least one LED of the light source unit 600, thereby easily flickering. A circuit for removing the above can be configured. In this case, of the at least two inductors, an inductor connected closest to the at least one LED may have the largest inductance. In the embodiment, referring to FIG. 5, the inductor L1 and the inductor L2 are connected in series, and the inductor L2 closest to at least one LED of the light source unit 600 may have the largest inductance.

  In the above, this invention was demonstrated centering on embodiment. Those skilled in the art will appreciate that the present invention can be embodied as a modified form without departing from the essential characteristics of the present invention. Accordingly, the disclosed embodiments should be considered in an illustrative, not a limiting sense. Therefore, the scope of the present invention should not be limited to the above-described embodiments, but should be construed to include various embodiments that fall within the scope of the claims and equivalent scope thereof.

  The present invention is applicable to technical fields related to LED lamps.

500: light source driving unit 502: first power supply terminal unit 504: first power supply terminal 506: second power supply terminal unit 508: second power supply terminal 510: first rectification unit 512: second rectification unit 514: filter unit 516: fixed Current control unit 600: Light source unit 700: LED lamp

Claims (12)

A light source unit including at least one LED;
It is connected to the light source unit and connected to a commercial AC power source, a magnetic or electronic ballast for fluorescent lamps, and each applied AC power source is converted to a DC power source, which is applied to the light source unit and at least 1 A light source driving unit that drives two LEDs,
The light source driving unit is
A power supply terminal that can be connected to or disconnected from the commercial AC power supply, magnetic or electronic ballast;
A rectifying unit connected to the power supply terminal unit and rectifying an AC power applied through the power supply terminal unit;
A power source output from the rectifying unit is smoothed, converted into the DC power source, and a filter unit that applies the light source unit,
Of the DC power source connected to the light source unit and applied to the high power source voltage terminal of the light source unit, the remaining power source voltage after being consumed by the at least one LED is applied through the low power source voltage terminal of the light source unit. A constant current control unit that operates to allow a constant current to flow through the at least one LED;
LED lamp including The power terminal portion is
The LED lamp according to claim 1, comprising an electronic element having a filament resistance value of the fluorescent lamp.   The LED lamp according to claim 2, wherein the electronic element is a positive temperature coefficient thermistor whose electrical resistance increases as the temperature rises.   2. The LED lamp according to claim 1, wherein the constant current control unit includes at least two inductors coupled to the at least one LED to remove a pulsating current included in a current flowing through the at least one LED. The at least two inductors are connected in series;
The LED lamp according to claim 4, wherein an inductor connected closest to the at least one LED has the largest inductance among the at least two inductors. The constant current controller is
The LED lamp according to claim 1, comprising at least one resistor, wherein a low power supply voltage of the light source unit is consumed by the at least one resistor so that a constant current flows through the at least one LED. A light source unit including at least one LED;
It is connected to the light source unit and connected to a commercial AC power source, a magnetic or electronic ballast for fluorescent lamps, and each applied AC power source is converted to a DC power source, which is applied to the light source unit and at least 1 A light source driving unit that drives two LEDs,
The light source driving unit is
A first power supply terminal portion that can be connected to or disconnected from any one of the first connection terminal portion of the magnetic or electronic ballast or the first power supply terminal and the second power supply terminal of the commercial AC power supply;
Of the second connection terminal part of the magnetic or electronic ballast or the first power supply terminal and the second power supply terminal of the commercial AC power supply, a second power supply terminal part that can be connected to or disconnected from the rest,
A first rectifier connected to the first power terminal and rectifying an AC power applied through the first power terminal;
A second rectifier connected to the second power terminal and rectifying an AC power applied through the second power terminal;
A power supply output from the first rectification unit and the second rectification unit is smoothed, converted to the DC power supply, and a filter unit that applies this to the light source unit,
Of the DC power source connected to the light source unit and applied to the high power source voltage terminal of the light source unit, the remaining power source voltage after being consumed by the at least one LED is applied through the low power source voltage terminal of the light source unit. A constant current control unit that operates to allow a constant current to flow through the at least one LED;
LED lamp including The first power terminal portion includes a first electronic element having a filament resistance value of the fluorescent lamp,
The LED lamp according to claim 7, wherein the second power terminal portion includes a second electronic element having a filament resistance value of the fluorescent lamp.   The LED lamp according to claim 8, wherein the first electronic element and the second electronic element are positive temperature coefficient thermistors that increase in electrical resistance as the temperature rises.   The LED lamp according to claim 7, wherein the constant current control unit includes at least two inductors connected to the at least one LED to remove a pulsating current included in a current flowing through the at least one LED. The at least two inductors are connected in series;
The LED lamp of claim 10, wherein an inductor connected closest to the at least one LED has the largest inductance among the at least two inductors. The constant current controller is
The LED lamp according to claim 7, comprising at least one resistor, wherein a low power supply voltage of the light source unit is consumed by the at least one resistor so that a constant current flows through the at least one LED.

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