TW201334619A - LED fluorescent lamp and circuit module thereof - Google Patents

Abstract

The present invention provides an LED fluorescent lamp and its circuit module. The circuit module is assembled in a lamp tube body and includes a rectification unit, a current and voltage stabilizing unit and an LED unit. The lamp tube body can be mounted on the fluorescent lamp base. The rectification unit has a first power terminal and a second power terminal. The first and second power terminals are electrically connected to the electrodes of the lamp tube body, respectively, for receiving the supply mains via the electrodes. The rectification unit converts the supply mains into a sinusoidal DC voltage. The current and voltage stabilizing unit is electrically connected to the rectification unit for converting the supply mains into a working power. The LED unit is electrically connected to the current and voltage stabilizing unit for receiving the working power so as to emit light, as a result, the present invention can be directly mounted on the fluorescent lamp base for use, without removing the starter and stabilizer of the fluorescent lamp base.

Description

LED fluorescent lamp and its circuit module

The invention is an LED circuit module, in particular to an LED fluorescent lamp and a circuit module thereof.

Referring to FIG. 5, a known fluorescent tube is disclosed. The fluorescent tube 40 has opposite ends, and each end has a first electrode 41 and a second electrode 42 respectively, and the first electrode 41 and the second electrode 42 A filament 43 is connected between the inside, and the inside of the fluorescent tube 40 has an inert gas and mercury vapor, and a fluorescent paint is applied to the inner surface of the fluorescent tube 40.

It is known that a fluorescent lamp holder has an actuator 51 and a ballast 52. When the fluorescent tube 40 is mounted on the socket, the actuator 51 is electrically connected between the first electrodes 41 at both ends of the fluorescent tube 40, and the second electrode 42 at both ends of the fluorescent tube 40 is connected to a mains supply Vac, wherein the ballast 52 is electrically connected between the commercial power supply Vac and one of the second electrodes 42.

When the commercial power supply Vac supplies power, the switch 50 of the starter 51 is turned off, so that the commercial power supply Vac generates high temperature through the filament 43 to assist the ionization of the inert gas in the fluorescent tube, and the electrons generated during the ionization of the inert gas and the mercury vapor occur. The reaction produces ultraviolet light, and the fluorescent paint in the fluorescent tube absorbs ultraviolet light to generate visible light, and the visible light is used as illumination; the ballast 52 is used to stabilize the current through the fluorescent tube.

However, fluorescent tubes contain a large amount of mercury vapor. If the discarded fluorescent tubes are not properly recycled, the mercury vapor will volatilize into the air and cause pollution. In view of the pollution caused by the traditional fluorescent tube, the light-emitting diode (LED) itself can be used as a light source component, which can reduce environmental pollution compared with the conventional fluorescent tube, so how to apply the light-emitting diode in the traditional fluorescent lamp holder The technical problem to be solved by the invention.

Therefore, the main object of the present invention is to provide an LED fluorescent lamp and a circuit module thereof, which are used as a light source component by a light-emitting diode to improve the environmental hazard caused by the use of chemicals such as mercury and fluorescent paint in conventional fluorescent lamps.

In order to achieve the above, the technical means adopted by the present invention is that the LED fluorescent lamp comprises: a lamp body having opposite first and second ends, each end having two electrodes; and a The circuit module is disposed in the lamp body, and comprises: a rectifying unit, comprising: a first power terminal, an electrode electrically connected to the first end of the lamp body; and a second power terminal, the electric An other electrode connected to the first end of the lamp body; a third power terminal electrically connecting the two electrodes of the second end of the lamp body; and two power output terminals outputting a sinusoidal DC voltage; The flow voltage stabilizing unit comprises: two input ends respectively electrically connected to the two power output ends of the rectifying unit to receive the sinusoidal DC voltage; and two output ends, outputting a working power supply; and an LED unit electrically connecting the stable The two output terminals of the current stabilizing unit emit light by receiving the working power.

In order to achieve the above, the technical means adopted by the present invention is to connect the circuit module of the LED fluorescent lamp to a lamp body, the lamp body has a first end portion and a second end portion, each of which has a first end portion and a second end portion. The circuit module includes: a rectifying unit, comprising: a first power terminal electrically connected to an electrode of the first end of the lamp body; and a second power terminal electrically connecting the lamp The other end of the first end of the tube body; a third power supply end electrically connecting the two electrodes of the second end of the lamp body; and two power output ends, outputting a sinusoidal DC voltage; The unit comprises: two input ends respectively electrically connected to the two power output ends of the rectifying unit to receive the sinusoidal DC voltage; and two output ends outputting a working power supply; and an LED unit electrically connected to the steady current voltage regulator The two outputs of the unit emit light by receiving the operating power.

When the present invention is installed in a fluorescent lamp socket, the first power terminal or the second power terminal of the rectifying unit is configured to receive a mains power supply, and the steady current voltage stabilizing unit converts the mains power into a working power source, and the LED unit receives the The working power source emits light, so that the present invention can be directly installed in the existing fluorescent lamp holder without changing the existing starter and ballast circuit, thereby replacing the conventional fluorescent lamp.

Please refer to FIG. 1 and FIG. 2 , which are block diagrams of a preferred embodiment of the LED fluorescent lamp of the present invention. The LED fluorescent lamp comprises a lamp body 10 and a circuit module 20 .

The lamp body 10 has a first end portion 11 and a second end portion 12. The first end portion 11 has two electrodes 111 and 112, and the second end portion 12 has two electrodes 121 and 122.

The circuit module 20 is disposed in the lamp body 10 and includes a rectifying unit 21, a steady current stabilizing unit 22 and an LED unit 23.

The rectifying unit 21 includes a first power terminal V1, a second power terminal V2, a third power terminal V3, and two power output terminals D1 and D2.

The first power terminal V1 is electrically connected to an electrode 111 of the first end portion 11 of the lamp body 10; the second power terminal V2 is electrically connected to the other electrode 112 of the first end portion 11 of the lamp body 10; The power terminal V3 is electrically connected to the two electrodes 121 and 122 of the second end portion 12 of the lamp body 10; the first, second and third power terminals V1, V2 and V3 are respectively connected to the mains power supply Vac, and the rectifying unit 21 After converting the commercial power supply Vac into a sinusoidal DC voltage, the sinusoidal DC voltage is outputted by the two power supply output terminals D1 and D2.

The steady current voltage stabilizing unit 22 includes two input terminals R1, R2 and two output terminals R3, R4. The two input terminals R1, R2 are electrically connected to the two power output terminals D1, D2 of the rectifying unit 21, respectively, to receive the sine wave. The DC voltage, after the steady current regulator unit 22 converts the sinusoidal DC voltage into a working power supply, the working power is outputted by the two output terminals R3 and R4.

The LED unit 23 is electrically connected to the two output terminals R3 and R4 of the steady current voltage stabilizing unit 22 to receive the operating power. The LED unit 23 can be composed of a plurality of LED elements connected in series or in parallel, and the LED element receives the operating power and emits light.

Referring to FIG. 2 , in the first preferred embodiment, the rectifying unit is a half-wave rectifier, and includes a first diode 211 and a second diode 212 .

The first diode 211 includes an anode and a cathode. The anode serves as the first power terminal V1. The cathode serves as a power output terminal D1 and is electrically connected to an input terminal R1 of the steady current voltage stabilization unit 22; The diode 212 includes an anode and a cathode. The anode serves as the second power terminal V2. The cathode is electrically connected to the cathode of the first diode 211. The third power terminal V3 of the rectifier unit 21 and another power source are provided. The output terminal D2 is short-circuited with the other input terminal R2 of the steady current voltage stabilizing unit 22.

When the first preferred embodiment is mounted to a lamp holder, it is assumed that the first power terminal V1 is electrically connected to the initiator and the second power terminal V2 is electrically connected to the mains power source. If the switch of the starter is turned on, the first power terminal V1 is not electrically connected to any component, so that the first diode 211 and the steady current regulator unit 22 form an open circuit, and the second diode 212 and the steady current regulator unit 22 and the LED unit 23 will form a circuit with the mains power supply, and the mains power supply passes through the second diode 212 to form a half-wave DC voltage, and the half-wave DC voltage passes through the steady-state voltage stabilization unit 22 to form a working power supply. The unit 23 receives the working power and emits light; if the switch of the starter is turned off, the anode of the first diode 211 forms a short circuit with the input terminal R2 of the steady current voltage stabilizing unit 22, and the first diode 211 is connected The two input terminals R1 and R2 of the steady current voltage stabilizing unit 22 are connected in parallel with the steady current voltage stabilizing unit 22, and the first diode 211 at this time does not affect the second diode 212 and the steady current voltage regulator. The circuit formed by the unit 22 and the LED unit 23, the LED unit 23 can still receive the working power from the steady current regulator unit 22 to emit light.

In the above, it is assumed that the second power terminal V2 is electrically connected to the starter and the first power terminal V1 is electrically connected to the mains power source. Similarly, if the switch of the starter is turned on, the first diode 211 and the steady current regulator unit 22 And the LED unit 23 will form a loop with the mains power supply; if the switch of the starter is turned off, the second diode 212 will be connected between the two input terminals R1, R2 of the steady current regulator unit 22 and the steady current regulator The cells 22 are formed in parallel, and the second diode 212 at this time does not affect the loop formed by the first diode 211, the steady current voltage stabilizing unit 22, and the LED unit 23.

Referring to FIG. 3, in the second preferred embodiment, the rectifying unit is a full-wave rectifier, and includes a first diode 211, a second diode 212, and a third diode 213. a fourth diode 214, a fifth diode 215 and a sixth diode 216, each of the diodes 211-216 having an anode and a cathode.

The anode of the first diode 211 serves as the first power terminal V1, and the cathode of the first diode 211 serves as a power output terminal D1 and is electrically connected to an input terminal R1 of the steady current voltage stabilizing unit 22; The cathode of the diode 212 is electrically connected to the anode of the first diode 211, and the anode of the second diode 212 serves as another power output terminal D2 and is electrically connected to the other input terminal R2 of the steady current voltage stabilization unit 22. The cathode of the third diode 213 is electrically connected to the cathode of the first diode 211, and the anode of the third diode 213 is electrically connected to the second end 12 of the bulb body 10 as the third power terminal V3. The two electrodes 121, 122; the anode of the fourth diode 214 is electrically connected to the anode of the second diode 212, the cathode of the fourth diode 214 is electrically connected to the anode of the third diode 213; The anode of the fifth diode 215 serves as the second power terminal V2, and the cathode of the fifth diode 215 is electrically connected to the cathode of the third diode 213; the cathode of the sixth diode 216 is electrically connected to the cathode The anode of the fifth diode 215, the anode of the sixth diode 216 is electrically connected to the anode of the fourth diode 214.

In the second preferred embodiment, when the second preferred embodiment is mounted on a lamp holder, it is assumed that the first power terminal V1 is electrically connected to the initiator and the second power terminal V2 is electrically connected to the mains power source. If the switch of the starter is turned on, the first power terminal V1 is not electrically connected to any component, so that the first and second diodes 211, 212 and the steady current voltage stabilizing unit 22 form an open circuit, and the third to sixth poles The body 213-216 constitutes a full-wave rectifier, the full-wave rectifier, the steady-state voltage stabilizing unit 22 and the LED unit 23 form a loop with the mains power supply, and the mains power source forms a full-wave DC voltage through the full-wave rectifier, the full-wave After the DC voltage passes through the steady current voltage stabilizing unit 22, a working power source is formed, and the LED unit 23 receives the working power source to emit light.

If the switch of the first end portion 11 of the lamp body 10 is electrically connected to the electrode 121 of the second end portion 12, the first power supply terminal V1 and the third power terminal V3 form a short circuit. As shown in FIG. 4, the first diode 211 is connected in parallel to the third diode 213, and the second diode 212 is connected in parallel to the fourth diode 214. Therefore, all the diodes 211-216 form a The full-wave rectifier 30 can generate a full-wave DC voltage, and the steady-state voltage stabilizing unit 22 can convert the full-wave DC voltage into an operating power source to drive the LED unit 23 to emit light.

As shown in FIG. 3, it is assumed that the second power terminal V2 is electrically connected to the initiator and the first power terminal V1 is electrically connected to the mains power supply. Similarly, if the switch of the initiator is turned on, the fifth and sixth diodes 215, 216 will form an open circuit with the third power terminal V3, and the first, second, third and fourth diodes 211-214 form a full-wave rectifier; if the switch of the starter is turned off, the second power terminal V2 and the third The power terminal V3 will form a short circuit, the fifth diode 215 will be connected in parallel to the third diode 213, and the sixth diode 216 will be connected in parallel to the fourth diode 214. Therefore, all the diodes 211 to 216 are formed. A full wave rectifier.

In summary, the LED fluorescent lamp of the present invention can be directly applied to the current fluorescent lamp holder. When the present invention is mounted on a lamp holder, whether the first power terminal or the second power terminal is electrically connected to the starter or ballast on the lamp holder, and regardless of whether the switch on the starter is turned on or off, it does not affect the stability. The flow stabilizing unit 22 generates an operating power source to drive the LED unit 23 to emit light.

10. . . Lamp body

11. . . First end

12. . . Second end

111, 112. . . electrode

121, 122. . . electrode

20. . . Circuit module

twenty one. . . Rectifier unit

211. . . First diode

212. . . Second diode

213. . . Third diode

214. . . Fourth diode

215. . . Fifth diode

216. . . Sixth diode

twenty two. . . Steady current regulator unit

twenty three. . . LED unit

30. . . Full wave rectifier

40. . . Fluorescent tube

41. . . First electrode

42. . . Second electrode

43. . . filament

51. . . Launcher

50. . . switch

52. . . Ballast

Figure 1 is a block diagram showing the circuit of the LED fluorescent lamp of the present invention.

Figure 2 is a circuit diagram showing a first preferred embodiment of the present invention.

Figure 3 is a circuit diagram showing a second preferred embodiment of the present invention.

Figure 4: Schematic diagram of the equivalent circuit of Figure 3.

Figure 5: Wiring diagram of known fluorescent lamps, starters and ballasts.

10. . . Lamp body

11. . . First end

111, 112. . . electrode

12. . . Second end

121, 122. . . electrode

20. . . Circuit module

twenty one. . . Rectifier unit

twenty two. . . Steady current regulator unit

twenty three. . . LED unit

Claims (6)

An LED fluorescent lamp comprising: a lamp body having an opposite first end and a second end, each end having two electrodes; and a circuit module disposed in the lamp body The method includes: a rectifying unit, comprising: a first power terminal electrically connected to an electrode of the first end of the lamp body; and a second power terminal electrically connected to the other electrode of the first end of the lamp body a third power terminal electrically connecting the two electrodes of the second end of the lamp body; and two power output terminals outputting a sinusoidal DC voltage; and a steady current voltage stabilizing unit comprising: two input ends, respectively Electrically connecting the two power output ends of the rectifying unit to receive the sinusoidal DC voltage; and two output terminals outputting a working power supply; and an LED unit electrically connecting the two output ends of the steady current stabilizing unit to receive the work The power is illuminated. The LED fluorescent lamp of claim 1, wherein the rectifying unit comprises: a first diode comprising: an anode as the first power terminal; and a cathode as a power output and electrically connected to the steady current An input terminal of the voltage stabilizing unit; a second diode comprising: an anode as the second power terminal; and a cathode electrically connected to the cathode of the first diode; the third power source of the rectifier unit The other power supply output is shorted to the other input of the steady current voltage stabilizing unit. The LED fluorescent lamp of claim 1, wherein the rectifying unit comprises: a first diode comprising: an anode as the first power terminal; and a cathode as a power output and electrically connected to the steady current An input terminal of the voltage stabilizing unit; a second diode comprising: a cathode electrically connected to the anode of the first diode; and an anode as another power output terminal and electrically connected to the steady current voltage stabilizing unit An input terminal; a third diode comprising: a cathode electrically connected to the cathode of the first diode; and an anode as the third power terminal; and a fourth diode comprising: An anode electrically connected to the anode of the second diode; and a cathode electrically connected to the anode of the third diode; a fifth diode comprising: an anode as the second power terminal; a cathode electrically connected to the cathode of the third diode; a sixth diode comprising: a cathode electrically connected to the anode of the fifth diode; and an anode electrically connected to the fourth diode anode. The circuit module of the LED fluorescent lamp is connected to a lamp body. The lamp body has a first end portion and a second end portion. Each end portion has two electrodes. The circuit module includes: The rectifying unit includes: a first power terminal electrically connected to an electrode of the first end of the lamp body; a second power terminal electrically connected to the other electrode of the first end of the lamp body; a power supply end electrically connecting two electrodes of the second end of the lamp body; and two power output ends outputting a sinusoidal DC voltage; and a steady current voltage stabilizing unit comprising: two input ends respectively electrically connected to the rectification The two power output ends of the unit receive the sinusoidal DC voltage; and the two output terminals output a working power supply; and an LED unit electrically connected to the two output ends of the steady current voltage stabilizing unit to receive the working power source to emit light. The circuit module of the LED fluorescent lamp of claim 4, the rectifying unit comprises: a first diode comprising: an anode as the first power terminal; and a cathode as a power output terminal and electrically connected An input terminal of the steady current voltage stabilizing unit; a second diode comprising: an anode as the second power terminal; and a cathode electrically connected to the cathode of the first diode; the rectifier unit The third power terminal and the other power output are short-circuited with the other input of the steady current voltage stabilizing unit. The circuit module of the LED fluorescent lamp of claim 4, the rectifying unit comprises: a first diode comprising: an anode as the first power terminal; and a cathode as a power output terminal and electrically connected An input end of the steady current voltage stabilizing unit; a second diode comprising: a cathode electrically connected to the anode of the first diode; and an anode as another power output and electrically connected to the steady current An input terminal of the voltage stabilizing unit; a third diode comprising: a cathode electrically connected to the cathode of the first diode; and an anode as the third power terminal; a fourth diode comprising An anode electrically connected to the anode of the second diode; and a cathode electrically connected to the anode of the third diode; a fifth diode comprising: an anode as the second power terminal And a cathode electrically connected to the cathode of the third diode; a sixth diode comprising: a cathode electrically connected to the anode of the fifth diode; and an anode electrically connected to the fourth The anode of the polar body.