CN201262338Y

CN201262338Y - LED decorating lamp strings

Info

Publication number: CN201262338Y
Application number: CNU2008201890566U
Authority: CN
Inventors: 张竹成; 杨松伟
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-08-19
Filing date: 2008-08-19
Publication date: 2009-06-24
Anticipated expiration: 2018-08-19

Abstract

The utility model discloses a string lamp of an LED decorative lamp, comprising a rectifier diode which is connected with an alternating current input end of a power supply. A direct current voltage output end of the rectifier diode is connected with at least two or more than two voltage stabilizing diodes in series; and a light-emitting diode is connected between a P area electrode and an N area electrode of each voltage stabilizing diode in parallel. The string lamp can not have influence on the normal luminescence of other LEDs even though one of the whole group of LEDs is open-circuit, and simultaneously the intelligent string lamp of the LED decorative lamp does not need overlarge working current, thus being convenient to design of the circuit.

Description

A kind of LED decoration lamp string

Technical field

The utility model relates to the LED decoration lamp string, is exactly the electronics principle problem that LED relates in actual applications specifically, is with a kind of at least two application circuits that above Zener diode constitutes that can be connected in series.

Background technology

LED belongs to energy saving, difficult heating, the life-span is long, brightness is even, in bright gay color semiconductor devices clearly, is widely used in illumination and decoration.

With reference to Fig. 1, Fig. 2, the application of LED great majority adopt plural LED to be together in series at present, and then connect operating voltage to LED, this series system uses the shortcoming that exists to be, if there is a LED open circuit to occur, just cause the LED of whole group series connection not luminous, decoration and illumination have been had a strong impact on to environment, when though single led parallel connection is used, do not influence the luminous of whole group LED in the time of can solving a LED open circuit, but LED quantity in parallel is many more, and the operating current that needs is just big more, i.e. the quantity (N) of operating current (I) * LED of operating current (IF)=each LED, electric current is excessive, bring serious difficulty for the design of circuit, if LED in parallel is few, then decorative aesthetics and illuminance variation.

Summary of the invention

At the problems referred to above, the utility model provides a kind of LED decoration lamp string, even one of them open circuit of whole group LED can not influence the normally luminous of other LED, simultaneously, the operating current that this intelligent LED decoration lamp string need not be excessive has made things convenient for the design of circuit.

The technical scheme that the invention for solving the technical problem adopted is:

A kind of LED decoration lamp string, comprise the commutation diode that connects the power supply ac input end, series connection inserts two or more at least Zener diodes on the dc voltage output end of commutation diode, is parallel with light emitting diode between the P region electrode of each Zener diode and the N region electrode.

The beneficial effects of the utility model are: provide a kind of by commutation diode, filter capacitor, Zener diode, the LED decoration lamp string that light emitting diode is formed, the voltage that this decoration lamp string Zener diode is clamped down on, can be used as the operating voltage of LED, when occurring the LED open circuit on the lamp string, still there is electric current operating current to be provided for other LED by Zener diode, guaranteed that other LED is normally luminous, this kind LED decoration lamp string, solved traditional LED Series lamp string, cause the non-luminous problem of whole group LED during a LED open circuit, simultaneously, need not as single led parallel connection, to provide bigger operating current, this LED decoration lamp string, more if desired LED quantity only needs two groups or above LED decoration lamp string in parallel get final product, even opening a way appears in LED arbitrarily, can not influence the normally luminous of other LED, effective guarantee is provided for environmental decoration and illumination.

Description of drawings:

The utility model is described in further detail below in conjunction with accompanying drawing.

Fig. 1 is the schematic diagram of existing traditional LED series connection decoration lamp string structure;

Fig. 2 is existing traditional LED decoration lamp string structural representation in parallel;

Fig. 3 is the lamp string structure schematic diagram of LED decoration lamp string of the present utility model.

Fig. 4 is the lamp body structure schematic diagram of LED decoration lamp string of the present utility model;

Fig. 5 is LED decoration lamp string circuit theory diagrams of the present utility model;

The specific embodiment

With reference to Fig. 3, Fig. 4 and Fig. 5, a kind of LED decoration lamp string of the present utility model, comprise commutation diode 1, filter capacitor 7, Zener diode 2, light emitting diode 3, lead 4,

contact copper sheet

5,6 and lamp socket 10, the front end of commutation diode 1 connects the power supply ac input end, the output of commutation diode 1 connects filter capacitor 7, series connection inserts two or more at least Zener diodes 2 on the dc voltage output end of filter capacitor 7, wherein, the P region electrode of Zener diode 2 is connected with the negative pole of DC voltage, the N region electrode of Zener diode 2 is connected with the positive pole of DC voltage, is parallel with light emitting diode 3 between the P region electrode of each Zener diode 2 and the N region electrode.

As preferred implementation, with reference to Fig. 3,4, decoration lamp string of the present utility model, at first lead 4 is connected with

contact copper sheet

5,6, secondly, the have lead 4 that contacts

copper sheet

5,6 lamp socket 10 inside of packing into, then Zener diode 2 is fixed on the protrusion platform of

contact copper sheet

5,6, at last, light emitting diode 3 is inserted the inside of lamp socket 10, can form the LED decoration lamp string.

After 1 rectification of alternating voltage AC process commutation diode, obtain DC voltage, DC voltage is after filter capacitor 7 leaches ripple, obtain little, stable, the level and smooth DC voltage of pulsing, 2 series connection of two or more Zener diodes are inserted on the DC voltage light emitting diode 3 in parallel on the P of each Zener diode 2 region electrode, N region electrode.The operating voltage of each light emitting diode 3 is the voltage that each Zener diode 2 is clamped down on.When open circuit appearred in light emitting diode 3, electric current can provide operating current for other LED through Zener diode 2.When open circuit appearred in light emitting diode 3, the voltage that Zener diode 2 is clamped down on can not be added on other light emitting diode 3, and when the ripple factor of 3 pairs of DC voltages of light emitting diode required to hang down, filter capacitor 7 can save.

In addition; with reference to Fig. 3; Fig. 5; lamp string of the present utility model; when being added in voltage that A orders when anodal; each Zener diode 2 can both be clamped down on voltage; because light emitting diode 3 and Zener diode 2 are reversed polarity to be connected in parallel (is the negative pole that the positive pole of Zener diode is connected LED; the negative pole of Zener diode connects the positive pole of LED); guaranteed that LED can be normally luminous; when being added in A; when the operating voltage that B is 2 is higher; Zener diode 3 is because the characteristic of clamping down on voltage in the operating voltage range of light emitting diode 3, has protected light emitting diode not breakdown voltage clamp.

Certainly, more than giving an example only the present invention is not breaking away from the spiritual category of the invention conveniently to illustrate, various simple and easy covert and modification that person skilled in the art scholar did still belong to technical scheme of the present invention.

Claims

1, a kind of LED decoration lamp string, it is characterized in that: comprise the commutation diode (1) that connects the power supply ac input end, series connection inserts two or more at least Zener diodes (2) on the dc voltage output end of commutation diode (1), is parallel with light emitting diode (3) between P region electrode of each Zener diode (2) and the N region electrode.

2, a kind of LED decoration lamp string according to claim 1, it is characterized in that: the P region electrode of described Zener diode (2) is connected with the negative pole of DC voltage, and the N region electrode is connected with the positive pole of DC voltage.

3, a kind of LED decoration lamp string according to claim 1, it is characterized in that: described Zener diode (2) and light emitting diode (3) place in the lamp socket (10), Zener diode (2) connects with the contact copper sheet (5) that is connected lead (4), (6), and in parallel with light emitting diode (3).

4, a kind of LED decoration lamp string according to claim 1 is characterized in that: be connected with filter capacitor (7) on the dc output end of described commutation diode (1).