CN101909385A

CN101909385A - Built-in AC driving method and circuit of LED fluorescent lamp

Info

Publication number: CN101909385A
Application number: CN2009102619890A
Authority: CN
Inventors: 黄赟山
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-10-22
Filing date: 2009-12-15
Publication date: 2010-12-08

Abstract

The invention discloses a safe built-in AC driving circuit of an LED fluorescent lamp. The built-in AC driving circuit of the LED fluorescent lamp comprises switch power module circuits respectively built in the two ends of the LED fluorescent lamp; the switch power module circuits are together connected to an LED constant-current driving circuit and then drive an LED lamp circuit to work and illuminate. The built-in AC driving circuit of the LED fluorescent lamp is novel in design, safe and reliable; after one end of the LED fluorescent lamp is connected with the AC power supply live wire (L wire), the user can safely touch the other end of the LED fluorescent lamp by hand, thereby the invention accords with the safety certification requirement on electrical products.

Description

LED fluorescent lamp built-in AC driving method and circuit

Technical field

The present invention relates to lighting field, relate to the built-in Alternating Current Power Supply safety of all LED fluorescent lamps especially.

Background technology

The LED fluorescent lamp is owing to advantages such as its low energy consumption, long-life and environmental protection are used increasingly extensively.The built-in ac power circuit principle that has more common LED fluorescent lamp now is as follows: by the conduction haptic element at LED fluorescent lamp two ends, connect built-in supply and AC power module, make the built-in lamp plate driving power module of LED fluorescent lamp obtain electric energy and work luminous.

Yet, adopt the LED fluorescent lamp of said structure to have following safety defect usually: when the live wire (L line) of the end conduction haptic element of LED fluorescent lamp and AC network when being connected, when the hand of installation personnel touches the conduction haptic element of the LED fluorescent lamp other end accidentally, can constitute conductive path, bring the potential safety hazard of electric shock to installation personnel, can not satisfy the safety requirements of electric equipment products.

Summary of the invention

The object of the present invention is to provide the built-in Alternating Current Power Supply technology of a kind of safe LED fluorescent lamp, to solve above-mentioned safety defect of the prior art.The built-in AC driving circuit modern design of this LED fluorescent lamp, safe and reliable.

Technical scheme principle provided by the invention is as follows:

The power supply grid power supply enters LED fluorescent lamp inside through the conduction haptic element of arbitrary end of LED fluorescent lamp, pass through the isolating transformer of each end respectively, pass through the rectification circuit of each end again, the DC power supply of each end output links together with LED lamp group circuit again, make the work of LED fluorescent lamp group luminous, reach the function (seeing accompanying drawing 1) that makes LED fluorescent lamp safety light-emitting.

Preferably, the grid alternating current source only needs to provide access from an end of LED fluorescent lamp, also can separately insert from two ends.

Preferably, the power module at two ends (1A, 1B) is that the function symmetry is identical.

Preferably, power module (1A, 1B) must have isolating transformer (11A, 11B) and current rectifying and wave filtering circuit (12A, 12B).

Preferably, the isolating transformer (11A, 11B) of the power module at two ends (1A, 1B) is that the function symmetry is identical with current rectifying and wave filtering circuit (12A, 12B).Certainly, the isolating transformer at LED fluorescent lamp two ends and current rectifying and wave filtering circuit are asymmetrical also is feasible.

Preferably, power module (1A) is stored on the PCB circuit board, and power module (1B) is stored on the PCB circuit board, and two pcb boards lay respectively at the two ends of LED fluorescent lamp.

Preferably, LED lamp plate circuit 13 is independent on another piece PCB circuit board.

Preferably, two ends lamp holder conduction haptic element is indicated power supply live wire (L line) and zero line (N line) that input ac power connected respectively in the aforesaid LED fluorescent lamp.

To sum up, with respect to prior art, LED fluorescent lamp provided by the invention has following advantage:

1, among the present invention, when the live wire (L line) of an end of LED fluorescent lamp conduction haptic element and AC network when being connected, when the hand of installation personnel touches the conduction haptic element of the LED fluorescent lamp other end accidentally, can not constitute conductive path, bring safe operating environment to installation personnel, satisfy the safety requirements of electric equipment products.

2, among the present invention, only needing provides AC power to any end conduction haptic element of LED fluorescent lamp, also can separately insert from two ends, can both make LED fluorescent lamp trouble free service, and illumination is provided.

3, because the two ends symmetry of this LED fluorescent lamp is identical, all can insert electrical network, reach the function of luminous lighting.So, when because externally fed factor when making insurance circuit in the inner end switch power module damage normally luminous lighting, externally service restoration normal after, only need the two ends of LED fluorescent lamp are turned, still can support normal luminous lighting by the switch power module of the other end.Prolonged the useful life of LED fluorescent lamp.

Description of drawings

Fig. 1 is the built-in alternating current circuit principle schematic of LED fluorescent lamp of the present invention.

Wherein, power module (1A, 1B) function symmetry is identical.Constitute by isolating transformer (11A, 11B) and current rectifying and wave filtering circuit (12A, 12B).

Wherein, power module (1A, 1B), LED lamp group 13 constitute the built-in alternating current circuit of LED fluorescent lamp.

Fig. 2 is the built-in alternating current circuit schematic diagram of the LED fluorescent lamp of embodiment 1.

Fig. 3 is the built-in alternating current circuit schematic diagram of the LED fluorescent lamp of embodiment 2.

Fig. 4 is the built-in alternating current circuit schematic diagram of the LED fluorescent lamp of embodiment 3.

Fig. 5 is the built-in alternating current circuit schematic diagram of the LED fluorescent lamp of embodiment 4.

Fig. 6 is the built-in alternating current circuit schematic diagram of the LED fluorescent lamp of embodiment 5.

Embodiment

Illustrate embodiments of the present invention with reference to the accompanying drawings.

Embodiment one

See also Fig. 2, the built-in alternating current circuit of LED fluorescent lamp of present embodiment comprises: switch power module (2A, 2B), LED constant-current driven module 23 and LED lamp group circuit 24.

Wherein, switch power module (2A, 2B) function symmetry is identical.Constitute by input electrical network filtering insurance circuit (21A, 21B), active isolation pfc circuit (22A, 22B).

Wherein, formation is preferably: switch power module (2A, 2B) and LED constant-current driven module 23 are integrated on the same pcb board; 24 in LED lamp group circuit is on another piece pcb board.

Embodiment two

See also Fig. 3, the built-in alternating current circuit of LED fluorescent lamp of present embodiment comprises: switch power module (3A, 3B), public LED constant-current driven module 35 and LED lamp group circuit 36.

Wherein, switch power module (3A, 3B) function symmetry is identical.Constitute by input electrical network filtering insurance circuit (31A, 31B), input rectifying filter circuit (32A, 32B), isolated variable circuit (33A, 33B) and output rectifying and wave-filtering control circuit (34A, 34B).

Wherein, constitute preferably and be: switch power module (3A, 3B) and public LED lamp pearl driver module 35 are integrated on the same pcb board, and 36 in LED lamp plate circuit is on another piece pcb board.

Embodiment three

See also Fig. 4, the built-in alternating current circuit of LED fluorescent lamp of present embodiment comprises: switch power module (4A, 4B) and LED lamp group circuit 46.

Wherein, switch power module (4A, 4B) function symmetry is identical.Constitute by input electrical network filtering insurance circuit (41A, 41B), input rectifying filter circuit (42A, 42B), isolated variable circuit (43A, 43B), output rectifying and wave-filtering control circuit (44A, 44B) and LED constant-current driven module (45A, 45B).

Wherein, constitute preferably and be: switch power module (4A, 4B) is on the pcb board separately of LED fluorescent lamp two ends (also can on a pcb board) respectively, and 46 in LED lamp group circuit is on another piece pcb board.

Embodiment four

See also Fig. 5, the built-in alternating current circuit of LED fluorescent lamp of present embodiment comprises: power module (5A, 5B), Switching Power Supply control module 54, LED constant-current driven module 55 and LED lamp group circuit 56.

Wherein, power module (5A, 5B) function symmetry is identical.Constitute by input electrical network filtering insurance circuit 51, isolation transforming circuit 52, output rectification circuit 53.

Wherein, constitute preferably and be: power module (5A, 5B), Switching Power Supply control module 54, LED constant-current driven module 55 are integrated on the same pcb board, and 56 in LED lamp group circuit is on another piece pcb board.

See also Fig. 6, the built-in alternating current circuit of LED fluorescent lamp of present embodiment comprises: AC network inserts from the two ends of LED fluorescent lamp, and power module (6A, 6B) series connection is used, and improves the accommodation to alternating current.

Wherein, power module (6A, 6B) function symmetry is identical.

Wherein, formation is preferably: electric source modes piece (6A, 6B), Switching Power Supply control module 64, LED constant-current driven module 65 are integrated on the same pcb board, and LED lamp group circuit 66 is on another piece pcb board.

The foregoing description and alternate embodiment are preferred implementation of the present invention; but embodiments of the present invention are not subjected to the restriction of the foregoing description and alternate embodiment; other any do not deviate from change, the modification done under spirit of the present invention and the principle, substitutes, combination, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.

Claims

1. LED fluorescent lamp built-in AC driving method, with the AC power of LED fluorescent lamp two ends inputs, respectively through the isolating transformer at two ends, again through the rectification circuit at two ends, the DC power supply of each end output links together with LED lamp group circuit again, makes the work of LED fluorescent lamp group luminous.

2. according to a kind of LED fluorescent lamp built-in AC driving method described in the claim 1, it is characterized in that: the AC power of LED fluorescent lamp two ends input, all must be through isolating transformer circuit and rectification circuit separately; This partial circuit input is an alternating current, and through isolated variable, output is direct current.

3. according to a kind of LED fluorescent lamp built-in AC driving method described in the claim 1, it is characterized in that: the direct current output of two ends power module is connected to LED lamp group circuit together, makes the work of LED fluorescent lamp luminous.

4. according to a kind of safe LED fluorescent lamp built-in AC driving method described in the claim 1, it is characterized in that: any end conduction haptic element of this LED fluorescent lamp is connected to AC network, and emergency lighting is provided.

5. built-in AC driving circuit of LED fluorescent lamp, comprise a pair of isolating transformer, a pair of rectification circuit, the AC power of LED fluorescent lamp two ends input, earlier respectively through the isolating transformer at two ends, again through the rectification circuit at two ends, the DC power supply of each end output links together with LED lamp group circuit again, makes the work of LED fluorescent lamp group luminous.

6. the built-in AC driving circuit of a kind of LED fluorescent lamp according to claim 5 is characterized in that: the AC power of LED fluorescent lamp two ends input, and all must be through isolating transformer circuit and rectification circuit separately; This partial circuit input is an alternating current, and through isolated variable, output is direct current.

7. the built-in AC driving circuit of a kind of LED fluorescent lamp according to claim 5 is characterized in that: any end conduction haptic element of this LED fluorescent lamp is connected to AC network, and emergency lighting is provided.

8. the built-in AC driving circuit of a kind of LED fluorescent lamp according to claim 5 is characterized in that: LED is that the isolating transformer (11A, 11B) at light modulation two ends is that symmetry is identical with current rectifying and wave filtering circuit (12A, 12B).

9. a kind of safe built-in AC driving circuit of LED fluorescent lamp according to claim 5 is characterized in that: power module (6A, the 6B) series connection that the built-in alternating current circuit of LED fluorescent lamp is formed is used.

10. according to the built-in AC driving circuit of a kind of LED fluorescent lamp described in the claim 1, it is characterized in that: the power module (1A) that isolating transformer and current rectifying and wave filtering circuit are formed is stored on the PCB circuit board, the power module of the other end (1B) is stored on the PCB circuit board, and two pcb boards lay respectively at the two ends of LED fluorescent lamp.