CN103249202B

CN103249202B - Led lamp

Info

Publication number: CN103249202B
Application number: CN201210025147.7A
Authority: CN
Inventors: 谢明村; 叶进连; 林志勇; 张家诚; 杨全褔
Original assignee: Rongchuang Energy Technology Co ltd; Zhanjing Technology Shenzhen Co Ltd
Current assignee: Rongchuang Energy Technology Co ltd; Zhanjing Technology Shenzhen Co Ltd
Priority date: 2012-02-06
Filing date: 2012-02-06
Publication date: 2015-04-29
Anticipated expiration: 2032-02-06
Also published as: CN103249202A; TW201333372A

Abstract

An LED lamp includes a switching end, a voltage transformation and rectification module, a reference module, a logic circuit, a drive module, an output end and a luminous module, wherein the switching end is used for being connected with an external power source, so as to provide electrical energy for the rectification module and the reference module; the voltage transformation and rectification module and the reference module are electrically connected with the logic circuit; and when the voltage output by the voltage transformation and rectification module and the voltage output by the reference module both meet the preset rated value of the logic circuit, the logic circuit outputs the electrical energy of at least one of the voltage transformation and rectification module and the reference module, and the electrical energy is transferred to the output end by the drive module, so as to lighten the luminous module. According to the invention, current from the logic circuit is input to the luminous module only when the input of the voltage transformation and rectification module and the input of the reference module both accord with the rated condition, and voltage or current that is too big and input from the outside cannot be input to the luminous module as the conducting condition of the logic circuit is not met, as a result, damage to the luminous module caused by overvoltage or overcurrent can be avoided.

Description

LED lamp

Technical field

The present invention designs a kind of light fixture, particularly a kind of LED lamp.

Background technology

LED(Light-Emitting Diode, light emitting diode) be developed so far, due to its there is energy-conservation, power saving, high efficiency, the reaction time is fast, the life cycle time is long and not mercurous, have the advantages such as environmental benefit, is considered to the best light source of new green energy conservation from generation to generation illumination.The LED lamp of low voltage drive is applied in daily life to be needed to convert civil power to applicable voltage through transformer.But existing transformer can not play a protective role to LED lamp, namely when the voltage instability timing in the external world, the voltage through transformer transformation also can be unstable.This kind of unstable voltage will easily cause the damage of LED as being entered directly into LED lamp.

Summary of the invention

In view of this, the LED lamp that a kind of energy available protecting LED is provided is necessary.

A kind of LED lamp, comprise incoming end, Transformer Rectifier module, with reference to module, logic circuit, drive module, output and illuminating module, this incoming end is used for being connected with extraneous power supply and providing electric energy for rectification module and with reference to module, this Transformer Rectifier module is electrically connected with this logic circuit with this reference module, when the voltage that Transformer Rectifier module and this reference module export meets the default rated value of logic circuit simultaneously, this logic circuit by this Transformer Rectifier module and with reference to module at least one of them electric energy export, and by driving module by delivery of electrical energy to output, thus light illuminating module.

Electric current is just had to input to illuminating module from logic circuit when this Transformer Rectifier module meets rated condition with the input with reference to module simultaneously; if therefore the voltage that inputs of the external world or electric current excessive; turn-on condition because of logical not circuit can not be inputted illuminating module; thus can not because of voltage or electric current excessive and damage this illuminating module, this illuminating module is shielded.

Accompanying drawing explanation

Fig. 1 is the internal circuit schematic diagram of LED lamp of the present invention.

Fig. 2 is LED lamp structure schematic diagram of the present invention.

Main element symbol description

10	Incoming end
		11	First incoming end
12	Second incoming end
		20	Transformer Rectifier module
30	With reference to module
		40	Logic circuit
50	Controller
		60	Drive module
70	Illuminating module
		80	FET
91	Diode
		92	Inductance
93	Electric capacity
		100	LED lamp
110	Lamp body
		111	Lampshade
112	Radiator
		113	Lamp housing
114	Pin
		120	Lamp socket
121	Drive circuit die set
		130	Socket

Following detailed description of the invention will further illustrate the present invention in conjunction with above-mentioned accompanying drawing.

Detailed description of the invention

Below in conjunction with accompanying drawing, the present invention is described in further detail.

Refer to Fig. 1, show the internal circuit schematic diagram of LED lamp 100 of the present invention.The major part of this circuit comprises incoming end 10, Transformer Rectifier module 20, with reference to module 30, logic circuit 40, controller 50, drives module 60 and illuminating module 70.Consider from the Integral design of circuit, this circuit also comprises the electronic components such as FET 80, diode 91, inductance 92, electric capacity 93, and this FET 80 as switch-linear hybrid in circuit.This incoming end 10, as the contact jaw of circuit and external power source, that is to say the input of circuit.This illuminating module 70 is multiple LED, and it is connected with the output of circuit.In the present embodiment, the civil power of the external 220V of this incoming end 10.This incoming end 10 comprises one first incoming end 11 and one second incoming end 12, to coordinate commercial power interface domestic at present.This first incoming end 11 point of three tunnel is connected this Transformer Rectifier module 20, this reference module 30 respectively and is connected to the drain electrode of this FET 80 by reversal connection one diode 91 again.This second incoming end 12 is connected with the source electrode of this FET 80.

Voltage by exporting the DC voltage meeting LED lamp 100 illuminating after Transformer Rectifier from 220V alternating voltage after Transformer Rectifier module 20.The output of this Transformer Rectifier module 20 divides two-way to export, and wherein a road is connected with one end of this illuminating module 70, and an other road is connected to this logic circuit 40.It is that the direct current with positive and negative polarities exports that this Transformer Rectifier module 20 realizes its two branch roads exported by a bridge rectifier.This illuminating module 70 electric capacity 93 in parallel inductance 92 of then connecting is connected to the drain electrode of this FET 80.Because direct for the alternating current of high pressure transformation becomes the direct current of low pressure to export by this Transformer Rectifier module 20, institute's produced problem in the middle of transformation process can be reduced better.Be connected with this logic circuit 40 with reference to module 30, the alternating current transformation inputted from the first incoming end 11 is become the DC voltage of a low pressure by it, and then low-voltage DC is inputed to logic circuit 40.Pre-set two conditions of this logic circuit 40, when the input of this Transformer Rectifier module 20 voltage and voltage input from this reference module 30 respectively satisfied two impose a condition time, this logic circuit 40 is just connected and exports a constant current.The numerical value of this constant current is according to follow-up controller 50 and drive the load current value of module 60 to determine, namely the size of constant current can not exceed controller 50 and drive the rated current of module 60.This constant current is by this Transformer Rectifier module 20 or this reference module 30 wherein one or jointly provide.Because the two-way power supply inputing to logic circuit 40 need meet default condition simultaneously, therefore strengthen the stability by the electric current after this logic circuit 40.This logic circuit 40, by adjusting voltage or the electric current of Transformer Rectifier module 20 and reference module 30, exports voltage or the electric current with special value.The output termination controller 50 of logic circuit 40, for controller 50 provides fixing electric current input.In the present embodiment, this controller 50 adopts Pwm controller, makes constant current hold further.The output of controller 50 is connected with driving module 60, provides fixing electric current for driving module 60.Certainly, this fixed current is that the rated current of this driving module 60 is for best.The output of this driving module 60 is connected with the grid of this FET 80.This controller 50 and this driving module 60 all stretch out another input and are connected with the second incoming end 12.

This FET 80 has the gauge tap of the internal circuit of the LED lamp 100 of protection circuit as this, when the grid of this FET 80 has voltage to input, and its source electrode and drain electrode conducting.Be connected to two branch road conductings of the source electrode of this FET 80, drain electrode, that is to say the power supply conducting at these illuminating module 70 two ends, this illuminating module 70 is externally luminous.Because Transformer Rectifier module 20 connects this illuminating module 70 and this logic circuit 40 respectively; electric current is just had to input this controller 50 when this Transformer Rectifier module 20 meets rated condition with the input with reference to module 30 simultaneously; therefore export fixing electric current after the electric current that this controller 50 is fixed and drive this driving module 60; then this illuminating module 70 is lighted; make the voltage of this illuminating module 70 of energy conducting can not damage this illuminating module 70 because of excessive, to this its protective effect of illuminating module 70.In other words, when voltage is excessive, logic circuit 40, by blocking rectification module 20 and the electric current with reference to module 30, makes illuminating module 70 extinguish, thus plays the effect of protection illuminating module 70.

Please refer to Fig. 2, show the schematic diagram of the LED lamp 100 using above-mentioned protection circuit.LED lamp 100 comprises lampshade 111, radiator 112, lamp housing 113, two pins 114, lamp socket 120 and a socket 130.Lampshade 111 is made up of transparent material.Radiator 112 is in a truncated cones shape, and its surface is enclosed by multi-disc radiating fin and forms.One end that the diameter of radiator 112 is larger forms a top, and one end that diameter is less forms a bottom.Lampshade 111 is connected to the top of radiator 112, and lamp housing 113 is connected to the bottom of radiator 112, and this two pins 114 stretches out from the other end away from this radiator 112 of this lamp housing 113.This lampshade 111, radiator 112, lamp housing 113 and pin 114 form a lamp body 110, and this lamp body 110 forms a receiving space.LED lamp 100 adopts light emitting diode as illuminating module 70.The receiving space that this illuminating module 70 is contained in the formation of this lamp body 110 is interior and luminous towards lamp housing 111.This lamp housing 111 can be designed to lenticular, to widen the bright dipping light field of LED lamp 10.This two pins 114 is connected with this illuminating module 70, and stretches out outside this lamp body 110, powers for this illuminating module 70 in order to be connected with power supply.This lamp socket 120 inside comprises drive circuit 121, and this drive circuit 121 comprises Transformer Rectifier module 20, reference module 30, logic circuit 40, controller 50 as shown in Figure 1 and drives module 60.This plug 130 stretches out from one end of this lamp socket 120, as the incoming end 10 of circuit as shown in Figure 1.

LED lamp 100 in present embodiment is MR16 type LED lamp 100, and the lamp socket 120 of its correspondence adopts GU5.3 type lamp socket 120.In other words, the diameter length of this LED lamp 100 is 2 inches, and its two pins 114 distance is 5.3 millimeters.Be different from existing MR16 light fixture, the position of the drive circuit 121 of the light fixture 100 in the present invention is arranged in lamp socket 120.Because drive circuit 121 adopts the circuit with protection circuit as shown in Figure 1, then when lamp body 110 is connected with lamp socket 120, lamp socket 120 can provide specified electric current to supply the illuminating module 70 in lamp body 110 luminous for lamp body 110.Traditional lamp socket only comprises the transformer being converted to low-voltage AC by High Level AC Voltage, because the instability of transformer, easily conflicts with the driving module be installed in lamp body and damages illuminating module.The present invention is hung on outside driving module 121 in lamp socket 120, and adopts protection circuit as shown in Figure 1, and LED lamp 100 can be avoided, because of transformer and the situation of the damage illuminating module 70 produced of conflicting of driving module, effectively extending the service life of LED lamp 100.

Claims

1. a LED lamp, it is characterized in that: comprise incoming end, Transformer Rectifier module, with reference to module, logic circuit, drive module, output and illuminating module, this incoming end is used for being connected with extraneous power supply and providing electric energy for rectification module and with reference to module, this Transformer Rectifier module is electrically connected with this logic circuit with this reference module, when the voltage that Transformer Rectifier module and this reference module export meets the default rated value of logic circuit simultaneously, this logic circuit by this Transformer Rectifier module and with reference to module at least one of them electric energy export, and by driving module by delivery of electrical energy to output, thus light illuminating module.

2. LED lamp as claimed in claim 1, is characterized in that: also comprise a controller and be connected between this logic circuit and this driving module.

3. LED lamp as claimed in claim 2, is characterized in that: this controller is Pwm controller.

4. LED lamp as claimed in claim 1, it is characterized in that: also comprise a FET, this incoming end comprises one first incoming end and one second incoming end, this the second incoming end is connected to the source electrode of this FET, this driving module is connected to the grid of this FET, and one end of this illuminating module is connected to the drain electrode of this FET.

5. LED lamp as claimed in claim 4, it is characterized in that: this first incoming end is divided into the first branch road and the second branch road, this first branch road connects this Transformer Rectifier module, and this second branch road connects this reference module.

6. LED lamp as claimed in claim 5, is characterized in that: this Transformer Rectifier module connects first along separate routes and second along separate routes, this first other end connecting this illuminating module along separate routes, and this second is connected to this logic circuit along separate routes.

7. LED lamp as claimed in claim 1, is characterized in that: this Transformer Rectifier module and this reference mould control this logic circuit output current and voltage respectively.

8. LED lamp as claimed in claim 1, is characterized in that: also comprise a lamp body and a lamp socket that can be separated with lamp body, this illuminating module is contained in this lamp body, and this Transformer Rectifier module, reference module, logic circuit and driving module are contained in this lamp socket.

9. LED lamp as claimed in claim 8, it is characterized in that: this lamp body comprises lampshade, radiator, lamp housing and two pins, this lamp socket also comprises socket.

10. LED lamp as claimed in claim 9, it is characterized in that: this lamp body is MR16 type light fixture, this lamp socket is GU5.3 type lamp socket.