JP2010092990A - Led fluorescent lamp - Google Patents

Abstract

[PROBLEMS] To improve the economy by extending the service life semipermanently, eliminating the need to consider the direction in which the LED fluorescent lamp is mounted, reducing energy waste, increasing heat dissipation efficiency, and preventing damage to the lamp due to overheating. The present invention provides an LED fluorescent lamp that enhances illumination efficiency and reduces user fatigue.
A body including a semi-cylindrical base, a plate provided on the base, and a cap coupled to the base; an LED module including a printed circuit board and a plurality of LEDs mounted on the printed circuit board; A fixed cover fixedly coupled to both ends of the main body and a driving circuit are included. The drive circuit includes a protection unit, a noise removal unit, and a smoothing unit that smoothes the output power supply of the noise removal unit, and a first power source electrically connected to the fixed cover connection pins on both sides, An LED fluorescent lamp comprising a second power input unit, a drive unit, and a feedback unit.
[Selection] Figure 3

Description

The present invention relates to an LED fluorescent lamp using an LED module composed of a printed board on which a large number of LEDs are mounted. In particular,
Utilizing LED modules can extend the service life semi-permanently, solve the limitations of the service life of conventional fluorescent lamps, and improve economy,
The LED module can be lit even if power is input from either of the sockets on both sides of the mercury discharge tube fluorescent lamp frame that has already been installed. When installing the LED module fluorescent lamp in the frame, it is necessary to consider the mounting direction. It is safe for the human body to touch because there is no outflow of power (voltage or current) from the other socket even if power is input from one of the sockets. ,
It has the advantage of reducing waste of energy by boosting or stepping down the input commercial AC power supply to make it a static power supply and increasing the power factor to supply it to the LED module,
By feeding back the current supplied to the LED module and continuously supplying a static current to the LED module, the brightness of the LED module illumination is kept constant, the heat generation is reduced, the efficiency is increased, and the life of the LED module is reduced. It is related with the LED fluorescent lamp provided with the drive circuit which can prevent doing.

  The present invention is also the above-mentioned LED fluorescent lamp, and in order to efficiently release the heat generated in the LED module, a plurality of radiating fin portions are formed along the longitudinal direction inside the base of the main body. The present invention relates to an apparatus that can prevent the damage of an illuminating lamp due to overheating and further prevent the risk of fire by increasing the heat dissipation area and increasing the heat dissipation efficiency.

  The present invention is also the above-mentioned LED fluorescent lamp, further, by forming relatively thin both sides from the upper center in the thickness of the cap, by increasing the amount of light radiated on both sides, By improving the directivity angle of the light emitted from the LED module, it is possible to increase the illumination efficiency of the fluorescent lamp, and in addition, to correct the transmission amount of the light source emitted from the LED module, The present invention relates to a material that is formed of a transparent member and allows direct light of an LED light source to pass through a cap, thereby enabling more natural and faint illumination and reducing a user's fatigue.

  The present invention is also the LED fluorescent lamp described above, further comprising attachment / detachment means that is elastically coupled and separated when the main body and the cap are coupled and separated, and the base of the main body when the fluorescent lamp fails and is repaired. Since the cap and the cap can be separated and combined quickly and conveniently, it relates to a device that can ensure convenience.

  Fluorescent lamps are one of the frequently used lighting fixtures with less glare, higher luminous efficiency and longer life than incandescent bulbs. In this fluorescent lamp, a small amount of mercury vapor and argon gas are sealed in a vacuum glass tube (mercury discharge tube), and then a voltage is applied to both ends so that light is emitted by gas discharge.

  Such a mercury discharge tube fluorescent lamp has a considerable difficulty in manufacturing because the mercury discharge tube must be sufficiently sealed, and has a problem of flickering at the end of its lifetime. When frequent switching operations are performed, There is a problem that the lifetime is rapidly shortened and a large amount of power is required. Recently, many types of lighting fixtures using LEDs as light sources have been presented as alternatives to such mercury discharge tube fluorescent lamps.

  For example, Patent Document 1 describes “LED lighting lamp (LED fluorescent lamp) that can be used for a fluorescent lamp socket having a ballast”. FIG. 1A is a perspective view and FIG. 1B is an exploded perspective view showing the LED fluorescent lamp. As shown in FIG. 1, the cover 5 and 6, the terminal cap 4, and the LED module built in the cover are shown. 1 and is used by being connected to both side sockets of a fluorescent lamp frame already installed in the same manner as a mercury discharge tube.

  The present invention also relates to an LED module fluorescent lamp (LED fluorescent lamp) in which an already installed fluorescent lamp frame is used as it is like the LED illumination lamp shown in FIG. The mercury discharge tube fluorescent lamp uses an AC power source as a driving power source, induces initial lighting, and a ballast is provided in the frame so that stable power is supplied after lighting. In contrast, LED fluorescent lamps normally use a DC power supply as a drive power supply. Therefore, in order to use an already installed fluorescent lamp frame as it is, an AC power input through a ballast is used as a DC power supply. A drive circuit that converts the power supply and supplies it to the LED module is required.

  The driving circuit of the conventional LED fluorescent lamp including the LED fluorescent lamp described in Patent Document 1 shown in FIG. 1 usually receives a driving power source only from one direction. Therefore, when the LED fluorescent lamp is installed in the socket of the frame, there is an inconvenience that it is necessary to pay attention to the mounting direction so that the driving power can be applied to the LED module.

  On the other hand, in Patent Document 2, a DC voltage is supplied to reduce eye fatigue, and a plastic convex lens-type transmission lens is used instead of a glass material in consideration of user safety. Disclosed is an LED fluorescent lamp that can be assembled and disassembled in a slide detachable manner, so that it can be easily reused and repaired. is doing.

  However, in the case of a fluorescent lamp using a conventional LED including the LED fluorescent lamp described in Patent Document 1 and Patent Document 2, the thickness of the translucent cap for transmitting the light emitted from the LED is overall. However, since the amount of transmitted light emitted from both sides of the translucent cap is small, there is a problem that the illumination effect by the fluorescent lamp cannot be formed uniformly. In the case of Patent Document 2, the direct light of the LED light source is transmitted as it is by the translucent cap to illuminate the room, so that reflection by a computer monitor, television, glass, mirror, etc. disposed in the room. In the case of Patent Document 2, in order to dissipate heat generated in the LED fluorescent lamp to the outside, there is a problem of giving fatigue to the consumer's eyes by light or light directly irradiated by the LED fluorescent lamp. A material such as a lightweight aluminum alloy excellent in heat dissipation is used. However, the aluminum alloy as described above is an expensive material, and there is a problem that an economic burden on consumers is increased.

Furthermore, in the case of Patent Document 2, in the attachment / detachment method, a projecting portion is formed on the translucent cap, an engaging groove corresponding to the projecting portion is formed on the outer side of the frame, and the projecting portion is the engaging groove. In this case, the projecting portion and the engagement groove are inclined surfaces and are formed so as to be in surface contact with each other. When the weight exceeds a certain level, there is a problem that it is not possible to prevent a phenomenon that is naturally separated by its own weight.
Korean Registered Patent No. 0844538 specification Korean Registered Patent No. 0828270

Therefore, the present invention has been made to solve the above problems,
Regardless of the mounting direction of the LED fluorescent lamp in the frame socket, a first power source and a second power source electrically connected to both side sockets of the frame so as to receive an AC power source via a ballast are provided. When power is input to any one power input section, power does not flow out at the power input section on the opposite side, so safe bi-directional input power processing is possible even if the human body touches,
Boosting or stepping down the input power supply to make it a static power supply to supply the appropriate power to the LED module, improving the power factor of the supplied power supply, reducing national energy waste, and keeping the LED module load to a certain level A fluorescent lamp using an LED having a drive circuit capable of maintaining a constant luminance of the LED so that a static current is continuously supplied to the LED module, reducing a heat generation amount, and preventing a reduction in the life of the LED. The purpose is to provide.

  In addition, in order to efficiently release the heat generated in the LED module, the present invention forms a large number of heat dissipating fin portions along the longitudinal direction inside the base of the main body, thereby increasing the heat dissipating area and improving the heat dissipating efficiency. An object of the present invention is to provide a fluorescent lamp using an LED capable of preventing damage to an illuminating lamp due to overheating and preventing a fire from occurring in advance.

  The present invention further increases the transmission amount of light emitted from both sides by forming the both sides relatively thin from the upper center in the thickness of the cap so that the directivity angle of light emitted from the LED module is increased. It is an object of the present invention to provide a fluorescent lamp using an LED that can improve the illumination efficiency of the fluorescent lamp by improving the expansion.

  Furthermore, the present invention further includes an attaching / detaching means that is elastically coupled and separated when the base and the cap of the main body are coupled and separated, so that the main body and the cap can be separated and coupled quickly and easily when a fluorescent lamp fails or is repaired. It is an object of the present invention to provide a fluorescent lamp using an LED that can be used and can guarantee its convenience.

  Furthermore, the present invention also provides a more natural and faint illumination by transmitting the direct light of the LED light source through a cap formed of a translucent member in order to correct the transmission amount of the light source irradiated from the LED module. An object of the present invention is to provide a fluorescent lamp using an LED capable of reducing fatigue of a user.

The fluorescent lamp using the LED according to the present invention is:
A body including a semi-cylindrical base, a plate provided on the upper part of the base, and a cap formed in a semi-cylindrical shape and coupled to the base so that the opening faces each other;
An LED module comprising a printed circuit board and a plurality of LEDs mounted on the printed circuit board, coupled to the upper surface of the plate of the main body and illuminating through the cap;
A fixed cover that is fixedly coupled to both ends of the main body and includes a connection pin electrically connected to a socket of a fluorescent lamp frame; and a built-in base of the main body that receives power from the connection pin of the fixed cover; A drive circuit for supplying the LED module to the LED module and controlling lighting of the LED;
The drive circuit is
A protection unit for preventing overvoltage and overcurrent of the input power supply, a noise removal unit for removing noise of the output power supply of the protection unit, and a smoothing unit for smoothing the output power supply of the noise removal unit, A first power input part and a second power input part electrically connected to the fixed cover connecting pins on both sides;
A drive unit for converting the power input from the first power input unit or the second power input unit into a static power source (static voltage or static current) of a certain size necessary for lighting the LED, and outputting the LED; and A feedback unit that senses a power supply (voltage or current) supplied to the drive unit and feeds it back to the driving unit.
According to this LED fluorescent lamp, when power is applied to the first power input section or the second power input section, there is no outflow of power from the second power input section or the first power input section on the opposite side. Therefore, even if a human body touches, safe bidirectional input power supply processing is possible.

  The drive unit of the drive circuit is an inductor that is charged with current by the output power supply of the smoothing unit and discharges the charged current; the inductor is switched so that current is charged or discharged, and the output of the smoothing unit A transistor for boosting or stepping down the power supply; a static power supply section for smoothing the power boosted or stepped down by the transistor and supplying the LED module; a coil for sensing a zero point of a current flowing through the inductor; and feedback from the feedback section The static power supply unit outputs a static power source (static voltage or static current), receives a zero point signal from the coil, and the power factor of the rectifier output power source is guaranteed. The pulse width of the pulse waveform applied to the transistor for switching the transistor Control unit for controlling the fine pulse frequency; may comprise.

The feedback unit includes:
A sensing unit that senses a current flowing through the LED module; a photocoupler that transmits a current sensed by the sensing unit; and a comparison unit that transmits a current transmitted by the photocoupler to a reference current in comparison with a reference current. The control unit may control switching of the transistor according to a signal transmitted from the comparison unit so that the static power supply unit outputs a static current.

The circuit pattern of the printed circuit board of the LED module is
An anode line and a cathode line that receive power from the drive circuit, and a mounting portion that is connected to the anode line and the cathode line and is electrically connected by mounting the LED;
The anode line and the cathode line are arranged at a predetermined interval in the longitudinal direction of the printed circuit board, and the mounting portion is arranged in the longitudinal direction between the anode line and the cathode line,
The circuit pattern including the anode line, the cathode line, and the mounting part is implemented symmetrically on the upper surface and the lower surface of the printed circuit board, and the circuit pattern on the upper surface and the circuit pattern on the lower surface are formed on the printed circuit board to reduce the circuit resistance value. It is electrically connected at multiple points through multiple connection holes that penetrate the bottom surface,
The printed circuit board on which the mounting parts are arranged has a large number of heat dissipation holes for releasing heat generated by the LEDs,
A heat dissipating sheet for transferring heat generated in the printed circuit board to the plate and releasing it may be attached to the lower surface of the printed circuit board in contact with the plate.

In the longitudinal direction inside the base of the main body, heat dissipating fins for increasing heat dissipating area and improving heat dissipating efficiency can be formed, and the cap gradually decreases in thickness from the upper center to both sides. The transmission angle of the light that is formed and emitted to both sides can be increased, and the directivity angle of the light emitted from the LED module can be expanded.

The LED fluorescent lamp is
An insertion portion formed at an upper end portion of the base; and a corresponding insertion portion formed at a lower end portion of the cap and coupled to the insertion portion. Detachable means for ensuring the ease of coupling and separation of the base and the cap by detaching the portion and the corresponding insertion portion with elasticity.
The insertion portion includes an insertion protrusion protruding inward from the upper end portion of the base and an insertion groove formed by the insertion protrusion, and the corresponding insertion portion protrudes outward from the lower end portion of the cap. A corresponding insertion protrusion coupled to the insertion groove; a corresponding insertion groove formed on an upper portion of the corresponding insertion protrusion; and the corresponding insertion protrusion formed on an opposing surface of the corresponding insertion protrusion. , And an inclined portion that enters along the inner wall that forms the insertion groove when coupled to the insertion groove.

  The LED fluorescent lamp according to the present invention includes a first power source and a second power input unit that are electrically connected to both side sockets of the fluorescent lamp frame by a driving circuit, and the LED fluorescent lamp is framed regardless of the direction. Even if it is mounted, it is possible to receive and process power from either one or both sockets of the frame, so that convenience for consumers is improved. In addition, when power is input to one of the socket power input sections, the power does not flow out from the other socket power input section, so that an electrical accident due to human contact can be prevented. Furthermore, the abnormal power supply (overvoltage, overcurrent, surge, noise, etc.) of the input power supply is cut off to protect the drive circuit and LED module, and a stable static current is supplied to the LED module to provide high quality lighting. can do.

  And when it has a radiation fin part, while releasing efficiently the heat which generate | occur | produces with an LED module by a radiation fin part, while preventing the damage of the illuminating lamp by overheating, the danger of a fire occurrence can be prevented beforehand. .

  When the attaching / detaching means is provided, the base and the cap of the main body can be quickly and easily separated and combined at the time of failure and repair of the fluorescent lamp, so that convenience can be ensured.

  In the case of the cap thickness, when both sides are formed relatively thin from the upper center, the amount of transmitted light emitted from both sides is increased so that the directivity angle of the light emitted from the LED module is expanded. By improving it, the illumination efficiency of the fluorescent lamp can be increased.

  When the cap is made of a semi-transparent material, it can correct the amount of light transmitted from the LED module and allow direct light from the LED light source to pass through the cap, enabling more natural and faint illumination. The fatigue feeling of the person can be reduced.

  Hereinafter, a fluorescent lamp using an LED according to the present invention (LED fluorescent lamp) will be described in more detail with reference to the accompanying drawings.

  2 is a perspective view showing an LED fluorescent lamp according to the present invention, FIG. 3 is an exploded perspective view showing an LED fluorescent lamp according to the present invention, FIG. 4 is an exploded sectional view showing an LED fluorescent lamp according to the present invention, and FIG. FIG. 6 is a perspective view (a), a plan view (b), and a rear view (c) of the LED module, and FIG. 7 is a block diagram of a drive circuit for the LED fluorescent lamp according to the present invention. FIG. 8 is a circuit diagram of an LED fluorescent lamp driving circuit according to the present invention.

  First, the drive circuit will be described with reference to FIG. 3, FIG. 7, and FIG.

  As shown in FIG. 3, the drive circuit 100 is built in the base 10, is connected to the connection pin 86 of the fixed cover 80, receives power from the socket of the fluorescent lamp frame, converts this to static electricity, and supplies it to the LED module 50. Then, the LED 51 is turned on.

  The drive circuit 100 can turn on the LED module 50 even when power is input from either of the sockets on both sides of the mercury discharge tube fluorescent lamp frame that is already installed. , No need to consider the mounting direction, improve the convenience of consumers, cut off the overvoltage and overcurrent of the input power supply, remove the surge voltage and noise introduced from the outside, always stable of a certain size A bi-directional input power supply process that allows a static current to be supplied to the LED module so that the LED module has a constant illuminance and can be lit without flickering becomes possible.

As shown in FIG. 7, the driving circuit 100 of the present invention includes a first power input unit 110, a second power input unit 120, a driving unit 130, and a feedback unit 140.
The first power input unit 110 and the second power input unit 120 are electrically connected to the connection pins 86 of the both-side fixed cover 80 and connected to the socket of the fluorescent lamp frame, so that an AC power supply is provided via a ballast. In response, the abnormal input power supply is cut off, smoothed and converted to direct current, and the direct current power is supplied to the drive unit 130.

  Only one of the first power input unit 110 and the second power input unit 120 can receive power through a socket (not shown) of a fluorescent lamp frame. It is also possible to receive power from sockets (not shown) on both sides.

  The first power input unit 110 and the second power input unit 120 include protection units 111 and 121, noise removal units 113 and 123, and smoothing units 115 and 125, respectively.

The protection units 111 and 121 include varistors ZNR11 and ZNR21 connected in parallel to a power input terminal connected to the socket 3, fuses F11 and F21 connected in series to the power input terminal, and an NTC resistor NTC11. , NTC21.
The varistors ZNR11 and ZNR21 cut off an overvoltage of the input power supply or a surge voltage flowing from the outside, the fuses F11 and F21 cut off this when an overcurrent is inputted, and the NTC resistors NTC11 and NTC21 are The drive circuit 100 and the LED module 50 are protected by interrupting the surge current to prevent abnormal power input.

The noise removal units 113 and 123 include capacitors C11, C12, C21, and C22 connected in parallel to the protection units 111 and 121, respectively. Although not shown in the drawing, the noise removing units 113 and 123 may further include inductors connected in parallel to the output terminals of the capacitors C11, C12, C21, and C22 and to the protection units 111 and 121, respectively. it can.
The capacitors (which may include inductors) of the noise removing units 113 and 123 remove surges and noises flowing from the outside and output them.

The smoothing units 115 and 125 smooth the power input from the noise removal units 113 and 123, convert the power to DC, and supply the power to the driving unit 130.
The smoothing units 115 and 125 include bridge diodes D11 to D14 and D21 to D24 that rectify the output power of the noise removing units 113 and 123, and resistors ZNR12, R11, R12, and ZNR22 that smooth the rectified power. R21, R22 and capacitors C13, C14, C23, C14.

The driving unit 130 includes an inductor L31, a transistor Q, an electrostatic power supply unit 132, a coil L32, a control unit 131, and a gain compensation unit 133.
The inductor L31 is temporarily charged by the output power supply of the smoothing units 115 and 125, and discharges the current charged by switching of the transistor Q, thereby boosting or stepping down the output power supply of the smoothing units 115 and 125. And supplied to the static power supply unit 132.
The transistor Q receives and switches a pulse signal from the controller 131 to charge or discharge the inductor L31 with a current.
The transistor Q uses a field effect transistor FET, and its gate terminal is connected to the control unit 131 to receive a pulse signal for switching, and its drain terminal is connected to the output terminal of the inductor L31. Charging and discharging are performed, and a gain compensation unit 133 composed of resistors R35 and R36 and a capacitor C35 is connected to the source terminal to stabilize the switching operation of the transistor Q and compensate the gain in the high frequency band. The resistors R35 and R36 of the gain compensator 133 stabilize the switching operation, and the capacitor C35 plays a role of gain compensation in a high frequency band.

The static power supply unit 132 smoothes and converts the power boosted or stepped down through the inductor L31 into a direct current, and supplies the static power (static voltage or static current) to the LED module 50 on the load side.
The static power supply unit 132 includes a diode D31 that rectifies the power that has passed through the inductor L31, and a capacitor C36 that smoothes and directs the power rectified by the diode D31.

The control unit 131 applies a pulse signal to the gate terminal of the transistor Q so that the static power supply unit 132 supplies the LED module 50 with a static voltage or a static current with improved power factor. Controls switching.
The control unit 131 controls the pulse width of the pulse signal applied to the gate terminal of the transistor Q so that the power output from the static power supply unit 132 is maintained at a constant level regardless of load fluctuations. In this way, the power frequency of the power output from the static power supply unit 132 is improved by controlling the pulse frequency of the pulse signal.

  In order to improve the power factor, synchronization resistors R31 and R32 that sense the voltage waveform of the output power supply of the smoothing units 115 and 125 and transmit them to the control unit 20 are connected to the output terminals of the smoothing units 115 and 125. Since the coil L32 is coupled to the inductor L31 with a magnetic flux, the zero point of the current flowing through the inductor L31 is detected and transmitted to the controller 131 via the resistor R33.

  The control unit 131 that senses the output voltage waveforms of the smoothing units 115 and 125 through the synchronization resistors R31 and R32 and receives the zero point of the current flowing through the inductor L31 through the coil L32, By controlling the switching of the transistor by controlling the frequency of the pulse to be applied, the waveform connecting the maximum values of the output currents of the smoothing units 115 and 125 has the same cycle as the output voltage of the smoothing units 115 and 125. Improve the power factor by making it proportional.

  In order to always supply a constant current to the LED module 50 regardless of load fluctuations, the control unit 131 supplies a power supply voltage or current supplied or output to the LED module 50 via the feedback unit 140. Is fed back via the feedback unit 140.

The control unit 131 fed back to the LED module 50 via the feedback unit 140 (or output from the LED module 50) controls the pulse width of the pulse signal applied to the transistor Q to switch the transistor. Is controlled so that a constant static current is always supplied to the LED module 50.
At this time, the static current is less affected by the connection relationship (series or parallel connection) of the LEDs constituting the LED module 50 than the static voltage, and a constant power can be supplied to all the LEDs. preferable.

The feedback unit 140 includes a sensing unit 141, a photocoupler 142, and a comparator CP.
The sensing unit 141 is connected between the output terminal of the static power supply unit 132 and the LED module 50 and senses the magnitude of current output through the LED module 50. As the sensing unit 141, a resistor and other active circuits can be used.
The photocoupler 142 transmits the magnitude of the current sensed by the sensing unit 141 to the comparator. At this time, in transmitting the signal received from the sensor to the comparator, in order to accurately transmit different kinds of signals having different sizes, the signal is transmitted to the receiver CP so as to be transmitted to the comparator CP. The side is insulated. That is, the photocoupler 142 includes a photodiode on the receiving side and a phototransistor on the transmitting side.
The comparator CP receives the magnitude of the current supplied from the photocoupler 142 to the LED module 50 via the + terminal, compares this with the reference current (or voltage) set at the-terminal, and The result is transmitted to the control unit 131. The controller 131 controls the pulse width of the pulse signal applied to the transistor Q according to the signal transmitted by the comparator, so that a constant static current is continuously applied to the LED module 50 on the load side. To be supplied.

  Hereinafter, the main body of the LED fluorescent lamp, the LED module, etc. of the present invention will be described with reference to FIGS.

  As shown in the drawings, the LED fluorescent lamp according to the present invention includes a main body B, an LED module 50, a fixed cover 80, and an attaching / detaching means 60. The main body B includes a base 10, a heat radiating fin portion 20, a plate 30, And a cap 40.

  The main body B incorporates the LED module 50 and the driving circuit 100, and fixed covers 80 are coupled to both ends.

The base 10 of the main body B is a semi-cylindrical slim or stick type, is formed to have a predetermined length, and forms the main body of the LED fluorescent lamp of the present invention.
The base is formed in a semi-cylindrical shape, has a housing portion 16 for housing the driving circuit 100, and an extension portion 14 bent upward is formed inside the upper portion.
The extension portion 14 is formed with a pair of facing each other having a predetermined width along the longitudinal direction, and the plate 30 is placed thereon, or the plate 30 is integrated with the extension portion 14, Two opposing extensions 14 can be connected.

  The heat radiating fin portion 20 is formed along the longitudinal direction inside the base 10, and is formed to increase the heat radiating area and increase the heat radiating efficiency. The heat dissipating fin portion 20 is a maximum as long as the space of the accommodating portion 16 of the base 10 allows to form a large number of heat dissipating fins on the inner wall surface of the accommodating portion 16 of the base 10 to ensure the maximum heat dissipating area. It is preferable to prevent the risk of fire from occurring while preventing damage to the illuminating lamp due to overheating by increasing the heat dissipation efficiency by forming a number.

The plate 30 is placed on the extension portion 14 or formed integrally with the extension portion 14, and receiving projections 34 project from the upper side on both sides. The LED module 50 is housed in a space defined by the bottom surface of the plate 30 and the housing protrusion 34.
And the taper 34a is formed in the upper inner side and the outer side of the said accommodating protrusion 34, the inclination of the coupling | bonding of the LED module 50 and the inclination part 64c formed in the corresponding | compatible insertion protrusion 64a of the corresponding | compatible insertion part 64 of the attachment / detachment means mentioned later. Correspondingly, it is preferable to ensure the ease of separation and coupling of the base 10 and the cap 40.

  The LED module 50 is attached to the surface (upper surface) of the plate 30, and electrically connects the printed circuit board 52, a number of LEDs 51 mounted on the printed circuit board 52, the drive circuit 100, and the LED 51. In order to do so, it comprises a circuit pattern provided on the printed circuit board. It is preferable that a heat radiation sheet (not shown) having excellent thermal conductivity is attached to the lower surface of the printed board 52 in contact with the plate 30 so that the heat of the printed board 52 is quickly released by the plate 30. It is preferable that the insulating film 53 is attached to the upper surface of the printed circuit board 52 to be mounted so that the LED is not connected to a circuit pattern of another part that is not a fixed position in the process of mounting the LED 51.

  FIG. 6 is a perspective view (a) of the LED module as viewed from above, a plan view (b) as viewed from above, and a rear view (c) as viewed from below. As shown in the figure, the circuit pattern is mounted such that an anode line 56 and a cathode line 57 that receive power from the driving circuit are connected to the anode line and the cathode line, and the LED is electrically connected. A mounting part 55 is formed, and the anode line 56 and the cathode line 57 are arranged in the longitudinal direction of the printed circuit board 52 with a predetermined interval therebetween, and the mounting part 55 is arranged in the longitudinal direction between the anode line and the cathode line.

A circuit pattern including the anode line 56, the cathode line 57, and the mounting part 55 is symmetrically implemented on the upper surface and the lower surface of the printed circuit board 52. In order to reduce the resistance value of the circuit pattern, the circuit pattern on the upper surface and the lower surface. These circuit patterns are electrically connected at a number of locations through a number of connection holes 59 that penetrate the upper and lower surfaces of the PC board.
The printed circuit board 52 on which the mounting portions 55 are arranged has a plurality of heat radiating holes 58 for releasing heat generated by the LEDs 51.

The cap 40 has a semi-cylindrical shape that covers the base 10, and the thickness of both side portions is relatively thinner than the center of the upper portion, thereby increasing the transmission amount of light radiated on both side portions, thereby the LED module. 50 is formed so as to expand the directivity angle of the light irradiated from 50.
That is, the cap 40 is formed in a semi-cylindrical shape so as to cover the upper portion of the base 10, and the both side portions are relatively thinner than the thickness of the upper center of the cap 40. It is preferable to enhance the illumination efficiency of the fluorescent lamp of the present invention by increasing the transmission amount of the light emitted from the LED module so that the directivity angle of the light emitted from the LED module 50 is extended.

  Further, the cap 40 is made of a translucent member for correcting the transmission amount of the light source irradiated from the LED module 50, and direct light of the light source of the LED module 50 is passed through the cap 40 formed of the translucent member. By transmitting the light, more natural and faint illumination is possible, and the user's eye fatigue can be reduced.

  The structure for coupling and separating the base 10 and the cap 50 is implemented by the attaching / detaching means 60 described below, and will be described together.

  The attachment / detachment means 60 includes an insertion portion 62 formed at the upper end portion of the base 10 and a corresponding insertion portion 64 formed at the lower end portion of the cap 40 and coupled to the insertion portion 62. When the base 10 and the cap 40 are attached / detached, the insertion portion 62 and the corresponding insertion portion 64 are elastically attached / detached to ensure the ease of coupling and separation between the base 10 and the cap 40. can do.

  And in the attaching / detaching means 60 for embodying this, the insertion part 62 extends at the upper end of the base 10 and is bent inward, the insertion protrusion 62a, and the extension part 14. And the corresponding insertion portion 64 is continuously bent inward and downward at the lower end of the cap 40 and protrudes outward to be coupled to the insertion groove 62b. Corresponding insertion protrusion 64a and a corresponding insertion groove 64b formed on the corresponding insertion protrusion 64a to which the insertion protrusion 62a is coupled.

  That is, when the base 10 and the cap 40 are coupled and separated, the insertion protrusion 62a of the insertion portion 62 can be elastically attached to and detached from the corresponding insertion groove 64b of the corresponding insertion portion 64, and the corresponding insertion portion 64 is further removed. Since the corresponding insertion protrusion 64a is elastically detachably formed in the insertion groove 62b of the insertion portion 62, the coupling and separation of the base 10 and the cap 40 can be realized more easily and simply. Therefore, in the LED fluorescent lamp of the present invention, for example, when the LED 51 is broken or damaged, or when an abnormality occurs in the printed circuit board 52, the base 10 and the cap 40 can be quickly and easily replaced or repaired. Therefore, it is possible to ensure convenient attachment / detachment convenience.

  In particular, when the base 10 and the cap 40 are coupled, the corresponding insertion projection 64 a of the corresponding insertion portion 64 is coupled in contact with the outer surface of the receiving projection 34. In this case, an inclined portion 64c inclined outward is formed in the inner lower portion of the corresponding insertion protrusion 64a, so that when the base 10 and the cap 40 are coupled, the ease of the coupling is ensured and the reliability is improved. High-quality products can be provided.

The fixed cover 80 is coupled to both ends of the main body B after the base 10 and the cap 40 are coupled, and fixes them. At this time, a coupling groove 18 is formed at the lower end of the extension 14 at the upper part of the base 10, and a corresponding coupling hole 82 corresponding to the coupling groove 18 is formed in the fixing cover 80, which is fixed by a coupling bolt 84. Combined.
A connection pin 86 for receiving power supplied from the outside is provided at the center of the outer side of the fixed cover 80. The connection pin 86 is coupled to the socket of the fluorescent lamp frame.

  As described above, the LED fluorescent lamp of the present invention has been mainly described with respect to the specific shape and structure based on the attached drawings. However, the present invention can be variously modified and changed by those skilled in the art. It should be construed as included in the scope of the invention.

It is the perspective view and exploded perspective view of the conventional LED fluorescent lamp. It is a perspective view which shows the LED fluorescent lamp by this invention. It is a disassembled perspective view which shows the LED fluorescent lamp by this invention. 1 is an exploded cross-sectional view showing an LED fluorescent lamp according to the present invention. 1 is a cross-sectional view illustrating an LED fluorescent lamp according to the present invention. It is the perspective view, top view, and back view of the LED module by this invention. It is a schematic block diagram of the drive circuit of the LED fluorescent lamp by this invention. It is a circuit diagram of the drive circuit of the LED fluorescent lamp by this invention.

Explanation of symbols

B Main body 10 Base 14 Extension portion 16 Housing portion 20 Radiation fin portion 30 Plate 34 Housing protrusion 34a Taper 40 Cap 50 LED module 51 LED
52 Printed Circuit Board 60 Attachment / Removal Means 62 Insertion Part 62a Insertion Protrusion 62b Insertion Groove 64 Corresponding Insertion Part 64a Corresponding Insertion Protrusion 64b Corresponding Insertion Groove 64c Inclined Part 80 Fixed Cover 82 Corresponding Joint Groove 84 Joint Bolt 86 Connection Pin 100 Drive Circuit 110 First Power Input unit 120 Second power input unit 111, 121 Protection unit 113, 123 Noise removal unit 115, 125 Smoothing unit 130 Drive unit 131 Control unit 132 Static power supply unit 140 Feedback unit

Claims (6)

A body including a semi-cylindrical base, a plate provided on the upper part of the base, and a cap formed in a semi-cylindrical shape and coupled to the base so that the opening faces each other;
An LED module comprising a printed circuit board and a plurality of LEDs mounted on the printed circuit board, coupled to the upper surface of the plate of the main body and illuminating through the cap;
A fixed cover that is fixedly coupled to both ends of the main body and includes a connection pin electrically connected to a socket of a fluorescent lamp frame; and a built-in base of the main body that receives power from the connection pin of the fixed cover; A drive circuit for supplying the LED module to the LED module and controlling lighting of the LED;
The drive circuit is
A protection unit for preventing overvoltage and overcurrent of the input power supply, a noise removal unit for removing noise of the output power supply of the protection unit, and a smoothing unit for smoothing the output power supply of the noise removal unit, A first power input part and a second power input part electrically connected to the fixed cover connecting pins on both sides;
A drive unit for converting the power input from the first power input unit or the second power input unit into a static power source (static voltage or static current) of a certain size necessary for lighting the LED, and outputting the LED; and A feedback unit that senses a power supply (voltage or current) supplied to and feeds back to the driving unit;
When power is applied to the first power input unit or the second power input unit, there is no outflow of power from the second power input unit or the first power input unit on the opposite side. An LED fluorescent lamp characterized in that a safe bidirectional power supply process is possible. The drive unit of the drive circuit includes:
An inductor that is charged with current by an output power source of the smoothing unit and discharges the charged current;
A transistor that switches so that a current is charged or discharged in the inductor and boosts or lowers the output power of the smoothing unit;
A static power supply unit that smoothes the power boosted or stepped down by the transistor and supplies the smoothed power to the LED module;
A coil for sensing a zero point of a current flowing through the inductor; and receiving the signal fed back from the feedback unit so that the static power supply unit outputs a static power source (static voltage or static current), and the coil A control unit that receives a zero point signal from the rectifier unit, ensures a power factor of the output power of the rectifier unit, and controls a pulse width and a pulse frequency of a pulse waveform applied to the transistor for switching the transistor The LED fluorescent lamp according to claim 1, comprising: The feedback unit includes:
A sensing unit that senses a current flowing through the LED module; a photocoupler that transmits a current sensed by the sensing unit; and a comparison unit that transmits a current transmitted by the photocoupler to a reference current in comparison with a reference current. Comprising
2. The control unit according to claim 1, wherein the control unit controls switching of the transistor in accordance with a signal transmitted from the comparison unit so that the static power supply unit outputs a static current. Item 3. The LED fluorescent lamp according to Item 2. The circuit pattern of the printed circuit board of the LED module is
An anode line and a cathode line that receive power from the drive circuit, and a mounting portion that is connected to the anode line and the cathode line and is electrically connected by mounting the LED;
The anode line and the cathode line are arranged at a predetermined interval in the longitudinal direction of the printed circuit board, and the mounting portion is arranged in the longitudinal direction between the anode line and the cathode line,
The circuit pattern including the anode line, the cathode line, and the mounting part is implemented symmetrically on the upper surface and the lower surface of the printed circuit board, and the circuit pattern on the upper surface and the circuit pattern on the lower surface are formed on the printed circuit board to reduce the circuit resistance value. It is electrically connected at multiple points through multiple connection holes that penetrate the bottom surface,
The printed circuit board on which the mounting portion is arranged has a plurality of heat radiating holes for releasing heat generated by the LEDs, and the heat generated by the printed circuit board is generated on the lower surface of the printed circuit board in contact with the plate. The LED fluorescent lamp according to any one of claims 1 to 3, further comprising a heat radiating sheet attached to the plate for discharge. In the longitudinal direction inside the base of the main body, a heat radiating fin portion for increasing the heat radiating area and increasing the heat radiating efficiency is formed,
The cap is formed so that the thickness gradually decreases toward the both sides from the upper center, and the transmission amount of the light emitted to both sides is increased, and the directivity angle of the light emitted from the LED module is expanded. The LED fluorescent lamp according to any one of claims 1 to 4. An insertion portion formed at an upper end portion of the base; and a corresponding insertion portion formed at a lower end portion of the cap and coupled to the insertion portion. An attachment / detachment means for ensuring ease of coupling and separation of the base and the cap by detaching the part and the corresponding insertion part with elasticity.
The insertion portion includes an insertion protrusion that protrudes inward from the upper end portion of the base, and an insertion groove formed by the insertion protrusion,
The corresponding insertion portion includes a corresponding insertion protrusion that protrudes outward from a lower end portion of the cap and is coupled to the insertion groove, and a corresponding insertion groove that is formed at an upper portion of the corresponding insertion protrusion and to which the insertion protrusion is coupled. And an inclined portion that is formed on an opposing surface of the corresponding insertion protrusion and enters along the inner wall that forms the insertion groove when the corresponding insertion protrusion is coupled to the insertion groove. The LED fluorescent lamp of any one of thru | or 5.

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