CN2872787Y

CN2872787Y - Improved connecting circuit of LED light string

Info

Publication number: CN2872787Y
Application number: CN 200520128034
Authority: CN
Inventors: 大卫·艾伦
Original assignee: Fiber Optic Designs Inc
Current assignee: Fiber Optic Designs Inc
Priority date: 2005-10-13
Filing date: 2005-10-13
Publication date: 2007-02-21
Anticipated expiration: 2015-10-13

Abstract

The utility model discloses an improved LED lamp series connection circuit, which comprises a front plug and a back plug connected in series via two leads; a bridge-type rectification circuit provided with AC input terminals is connected with two leads, and divided into a DC output anode group and a DC output cathode group respectively disposed on the front plug side and back plug side; the LED serial connection section is connected in series between the above DC output anode and cathode. The utility model is characterized in that: one or more bridge-type rectification circuits are connected in series in the LED serial connection section, and the AC input ends of the bridge-type rectification circuit are respectively connected with two leads. With the intermediate rectification circuit connected in series in the LED serial connection section, the utility model removes the limit on LED quantity in the LED serial connection section, and simultaneously avoids burning of rectification diode due to over-current caused by shunt circuit in existing technology, thereby greatly improving safety and reliability.

Description

Improved LED lamp string connection circuit

Technical field

The utility model relates to the decorative lamp field, especially a kind of connecting circuit with a plurality of tie points that is used to connect the LED lamp.

Background technology

Because light-emitting diode (LED) has superior functions such as high reliability, low power consuming, low working temperature and long life, by being applied on Christmas lights and other various decorative lamps more and more widely.The manufacturer of LED lamp decoration when maximization improves the brightness of LED lamp and other advantage, the gap between the production cost that dwindles LED lamp decoration and conventional incandescent lamp decoration of always trying every means.

As everyone knows, LED under DC power supply, work can be maximum the advantage of having given play to high brightness.And when adopting alternating current to drive, problem such as cause that easily the LED life-span lowers.

As shown in Figure 1, existing common lamp decoration mainly includes preceding 01 an and tail slotting 02 of inserting that can directly be connected with AC power, before insert 01 and tail insert between 02 the positive and negative end and link to each other by power line, be parallel with AC-DC converter 03 between power line, the output of AC-DC converter 03 can be connected with one or more LED series block 04.As shown in Figure 2, above-mentioned AC-DC converter 03 is a bridge-type rectifier, needs four lead 231-234, makes that the outward appearance of lamp string is attractive in appearance inadequately, production cost is also higher, simultaneously, because the restriction of voltage also defines the LED quantity in the LED series block, when rated voltage is 220V, then the LED quantity in the LED series block is 100, and when voltage was 110V, LED quantity was 50.

A kind of connecting circuit of improvement is disclosed in United States Patent (USP) 10/836,062.As shown in Figure 3, this technology is that 4 rectifier diode 31-34 in the rectification circuit are separated into two groups, is separately positioned on the both sides of connecting circuit, and LED series block 30 is connected between two groups of rectifier diodes, with the quantity of saving electric wire, thereby reach the saving production cost.Owing to the LED40 quantity in every section LED series block 30 is limited, therefore large-scale lamp decoration just can only have been realized by increasing LED series block 30.When increasing by 30 parallel connections of LED series block, it connects as shown in Figure 4, and LED series block 30 is connected in parallel with each other between two groups of rectifier diodes of circuit both sides, is easy to generate extra potential safety hazard.Connecting circuit shown in Fig. 3,4, the electric current that passes through of each paths of LEDs series block is the 3-5 milliampere.Along with the way of parallel connection increases, electric current also increases fast, and the heat that electric current produced is easy to burn out the diode in the rectification circuit, causes overheated, operational failure even fire, experimental results show that when electric current to reach 1 ampere-hour, the plastics around the promptly fusible diode.

Summary of the invention

In order to solve the defective that exists in the prior art, the purpose of this utility model provides a kind of improved LED lamp string connection circuit, makes the LED quantity in the LED series block unrestricted, realizes that safety connects, and has effectively solved the deficiencies in the prior art.

The purpose of this utility model is achieved in that a kind of improved LED lamp string connection circuit, includes:

--preceding slotting slotting with tail, this preceding inserting with tail is slotting is connected in series by two leads;

--the bridge rectifier that ac input end is connected with two leads, bridge rectifier are divided into two groups at direct current output cathode and negative pole, are divided into anterior insert end and tail spigot;

--the LED series block is series between the direct current output cathode and negative pole that above-mentioned bridge rectifier is divided into;

It is characterized in that: be in series with one or more bridge rectifier in the described LED series block, the ac input end of this bridge rectifier is connected with two leads respectively.

The utility model is connected with bridge rectifier between the LED series block, broken through the LED restricted number in the LED series block, avoided simultaneously crossing the danger that the strong rectifier diode that causes is burnt out owing to parallel branch causes electric current in the prior art, fail safe and reliability improve greatly.

Description of drawings

Fig. 1 is the circuit theory diagrams of decorative chain;

Fig. 2 is the circuit theory diagrams of AC-DC converter of the prior art;

Fig. 3 is the circuit connection diagram of another syndeton in the prior art;

Fig. 4 is the circuit connection diagram of another syndeton in the prior art;

Fig. 5 is the circuit connection diagram of the utility model embodiment 1;

Fig. 6 is the circuit connection diagram of the utility model embodiment 2.

Embodiment

The following stated only is specific embodiment of further setting forth the utility model principle, does not therefore limit protection range of the present utility model.

Embodiment 1

As shown in Figure 5, inserting 109, tails before the utility model comprises one inserts 110, is divided into bridge rectifier, LED series block 107 and a bridge rectifier 111 of two groups.Bridge rectifier is made up of 4 rectifier diode 101-104, be divided into two groups at direct current output cathode and negative pole, be divided into anterior insert end and tail spigot: wherein the negative pole of the rectifier diode 101,102 of direct current output negative pole group connects together, and its positive pole links to each other with the anode of tail slotting 110 and the lead 108 of negative terminal with preceding slotting 109 respectively; The positive pole of the rectifier diode 103,104 of direct current output cathode group connects together, and its negative pole links to each other with the anode of tail slotting 110 and the lead 108 of negative terminal with preceding slotting 109 respectively.LED series block 107 is connected between the positive pole of the negative pole of above-mentioned rectifier diode 101,102 and rectifier diode 103,104.Between the positive pole of LED series block 107 and rectifier diode 103,104, also be provided with the dropping equipment of forming by the resistance 105 and the electric capacity 106 of series connection.

(for example between the 100th LED and the 101st LED) is connected in series with a bridge rectifier 111 in appropriate location in the middle of LED series block 107.This bridge rectifier 111 comprises one or four rectifier diode 101a-104a: the negative pole of rectifier diode 103a, 104a connects together and is connected with LED series block 107 leading portions, and its positive pole links to each other with the anode of tail slotting 110 and the lead 108 of negative terminal with preceding slotting 109 respectively; The positive pole of rectifier diode 101a, 102a connects together and is connected with LED series block 107 back segments, and its negative pole links to each other with the anode of tail slotting 110 and the lead 108 of negative terminal with preceding slotting 109 respectively.This moment, rectifier diode 101,102 formed the loop by lead 108, LED series block 107 leading portions and rectifier diode 103a, 104a, constituted the first of whole connecting circuit; Rectifier diode 101a, 102a form the loop by lead 108, LED series block 107 back segments and rectifier diode 103,104, constitute the second portion of whole connecting circuit.Also can be connected with the dropping equipment that the resistance 105a that connects and electric capacity 106a form between the rectifier diode 103a of bridge rectifier 111,104a negative pole and LED series block 107 leading portions.

Preceding 109 household plug outlet that comprise-can be connected with AC power of inserting, the rectifier diode 101,102 of direct current output negative pole group is installed in the shell of this plug, and is in aggregates with the plug assembling.The back is inserted 110 and is comprised-socket, the rectifier diode 103,104 of direct current output cathode group, and dropping equipment all is installed in the shell of this socket, in aggregates with the socket assembling.Being series at LED series block 107 middle bridge rectifier and dropping equipments is installed in the box body.AC power adopts 220V or 110V all can.

Embodiment 2

As shown in Figure 6, the utility model comprise insert 109, tails before one and insert 110, be divided into two groups bridge rectifier, LED series block 107 and two bridge rectifiers 111,111 '.Bridge rectifier is made up of 4 rectifier diode 101-104, is divided into two groups at direct current output cathode and negative pole, is divided into anterior insert end and tail spigot.LED series block 107 is connected between the positive pole of rectifier diode 103,104 of the negative pole of rectifier diode 101,102 of above-mentioned direct current output negative pole group and direct current output cathode group.Between the positive pole of LED series block 107 and direct current output cathode group rectifier diode 103,104, also be provided with the dropping equipment of forming by resistance 105 and electric capacity 106, with embodiment 1.

In LED series block 107, be connected with respectively two bridge rectifiers 111,111 ', LED series block 107 is divided into three sections.Bridge rectifier 111 is made up of four rectifier diode 101a-104a, bridge rectifier 111 ' and by forming by four rectifier diode 101a '-104a '.Wherein, rectifier diode 101,102 forms the loop by lead 108, LED series block 107 leading portions and rectifier diode 103a, 104a, constitutes the first of whole connecting circuit; Rectifier diode 101a, 102a constitute the second portion of whole connecting circuit by lead 108, LED series block 107 stage casings and rectifier diode 103a ', 104a ' formation loop; Rectifier diode 101a ', 102a ' form the loop by lead 108, LED series block 107 back segments and rectifier diode 103,104, constitute the third part of whole connecting circuit.Equally, each bridge rectifier 111,111 ' rectifier diode 103a and 104a negative pole, also can be connected with dropping equipment respectively between 103a ' and 104a ' negative pole and the LED series block 107, respectively by the resistance 105a and the electric capacity 106a that connect, resistance 105a ' and electric capacity 106a ' composition.By parity of reasoning for the principle of a plurality of bridge rectifiers of connecting.

Above-mentioned specifically described purpose is that principle of the present utility model and practical application are made an explanation, and is not to qualification of the present utility model.Any technology similar or that be equal to is used and is remained in the scope of the utility model claim.

Claims

1. improved LED lamp string connection circuit includes:

--preceding (109) and the tail slotting (110) inserted, slotting (109) and tail slotting (110) are connected in series by two leads (108) before this;

--the bridge rectifier that ac input end is connected with two leads (108), bridge rectifier are divided into two groups at direct current output cathode and negative pole, insert (109) end and tail before being divided into and insert (110) and hold;

--LED series block (107) is series between the direct current output cathode and negative pole that above-mentioned bridge rectifier is divided into;

It is characterized in that: be in series with one or more bridge rectifier (111) in the described LED series block (107), the ac input end of this bridge rectifier (111) is connected with two leads (108) respectively.

2. improved LED lamp string connection circuit according to claim 1, it is characterized in that: the described bridge rectifier that is divided into two groups at direct current output cathode and negative pole is made up of four rectifier diodes (101-104), wherein the negative pole of the rectifier diode of direct current output negative pole group (101,102) connects together, and its positive pole links to each other with the anode of tail slotting (110) and the lead (108) of negative terminal with preceding insert (109) respectively; The positive pole of the rectifier diode of direct current output cathode group (103,104) connects together, and its negative pole links to each other with the anode of tail slotting (110) and the lead (108) of negative terminal with preceding insert (109) respectively.

3. improved LED lamp string connection circuit according to claim 1 is characterized in that: also be provided with dropping equipment between the positive pole of the rectifier diode (103,104) of described LED series block (107) and direct current output cathode group.

4. improved LED lamp string connection circuit according to claim 3 is characterized in that: described dropping equipment is made up of resistance (105) of connecting and electric capacity (106).

5. improved LED lamp string connection circuit according to claim 1, it is characterized in that: the negative pole of the rectifier diode of described direct current output negative pole group (101,102) is connected by the positive pole of the rectifier diode (103a, 104a) of LED series block (107) and bridge rectifier (111), the positive pole of rectifier diode (101,102) is connected by the negative pole of the rectifier diode (103a, 104a) of lead (108) and bridge rectifier (111), forms the loop.

6. improved LED lamp string connection circuit according to claim 1, it is characterized in that: the positive pole of the rectifier diode of described direct current output cathode group (103,104) is connected by the negative pole of the rectifier diode (101a, 102a) of LED series block (107) and bridge rectifier (111), the negative pole of rectifier diode (103,104) is connected by the positive pole of the rectifier diode (101a, 102a) of lead (108) and bridge rectifier (111), forms the loop.

7. improved LED lamp string connection circuit according to claim 1 is characterized in that: be connected with dropping equipment between the positive pole of rectifier diode (103a, 104a) and the LED series block (107) in the described bridge rectifier (111).

8. improved LED lamp string connection circuit according to claim 7 is characterized in that: described dropping equipment is made up of resistance (105a) and electric capacity (106a) series connection.

9. improved LED lamp string connection circuit according to claim 1 is characterized in that: insert (109) before described and comprise a household plug outlet that can be connected with AC power.

10. improved LED lamp string connection circuit according to claim 1 is characterized in that: described back is inserted (110) and is comprised a socket.