CN201561307U

CN201561307U - LED lighting lamp

Info

Publication number: CN201561307U
Application number: CN2009202384301U
Authority: CN
Inventors: 刘东芳
Original assignee: HEYUAN CHIUYUE OPTOELECTRONICS TECHNOLOGY Co Ltd
Current assignee: HEYUAN CHIUYUE OPTOELECTRONICS TECHNOLOGY Co Ltd
Priority date: 2009-11-04
Filing date: 2009-11-04
Publication date: 2010-08-25
Anticipated expiration: 2019-11-04

Abstract

The utility model discloses an LED lighting lamp which comprises a lamp holder (1). A power plug (4) is arranged on the lamp holder, a support rod (2) is articulated on the lamp holder, the other end of the support rod is articulated with a lamp cap cover (3), a driving circuit is arranged in the lamp holder, an LED (5) is arranged in the lamp cap cover, and the driving circuit is electrically connected with the power plug and the LED and comprises an overcurrent and overvoltage startup surge protective circuit (6), an EMI (Electro-Magnetic Interference) filter circuit (7), a bridge type rectification circuit (8), a PFC (Power Factor Correction) circuit (9) and a constant current processing output circuit (10), wherein the overcurrent and overvoltage startup surge protective circuit (6), the EMI filter circuit (7) , the bridge type rectification circuit (8), the PFC circuit (9) and the constant current processing output circuit (10) are sequentially connected in series. The utility model fulfills the functions of overcurrent protection, EMI processing and PFC, and therefore, when any LED is damaged, work of other LEDs can not be influenced. The lamp holder, the support rod and the lamp cap cover are articulated with one another, thereby being capable of rotating up and down and conveniently regulating the height and the angles.

Description

The LED illuminating lamp

Technical field

The utility model belongs to the technical field of lighting, specifically is meant a kind of LED illuminating lamp.

Background technology

For saving energy resource consumption, the lighting of power saving, low heating, environment-friendly type seems more urgent.As light source, its shortcoming light is dazzling with thermal source bulb etc. for conventional bulb such as incandescent lamp, and light efficiency is low simultaneously, and caloric value is big, burns out easily; And the fluorescent tube and the electricity-saving lamp that generally use at present, fluorescent tube contains toxic gases such as mercury; Conventional bulb or fluorescent lamp need higher driving voltage in addition, and fluorescent tube easily breaks, and cause transportation inconvenient, and service life is short.

Present stage come into vogue adopt light emitting diode (LED) as light source applications in illuminating lamp, though need shortcomings such as higher driving voltage and power consumption are big before having solved.But because the resistance of LED changes in the course of the work, the nonlinear change along with variation of temperature so the LED load is not permanent ohmic load, is a dynamic load.But the power circuit of current most of LED lightings adopts capacitance decompression and bridge rectifier, and capacitance decompression is not suitable for dynamic load, is not suitable for capacitive and inductive load, can not be used for high-power.Simultaneously, the power circuit of most of LED lightings also has problems at aspects such as over-current over-voltage protection, the anti-surge surge protection of start, EMI processing, power factor (PFC) corrections.

The connection design that the drive circuit great majority of current LED lighting adopt pure series connection or connection in series-parallel to combine.If adopt pure series circuit design, when one of them LED breaks down, can influence the illumination of whole light fixture; If the connection of adopting connection in series-parallel to combine when one of them LED breaks down, a string LED illumination can occur and break down; Light fixture can make maintenance frequency increase like this, the maintenance cost height.

The utility model content

The purpose of this utility model is to provide a kind of have overcurrent protection, EMI processing and PFC rectification, can not have influence on the LED illuminating lamp of other LED work when wherein any one LED damages.

For solving the problems of the technologies described above, the technical solution adopted in the utility model is: the LED illuminating lamp, comprise lamp socket, described lamp socket is provided with attaching plug, be hinged with support bar on the lamp socket, the other end of support bar is hinged with Cap casing, is provided with drive circuit in the described lamp socket, be provided with LED in the described Cap casing, described drive circuit is electrically connected with attaching plug, LED.Described drive circuit comprises overcurrent-overvoltage, the start surge protection circuit of serial connection successively, the EMI filter circuit, and bridge rectifier, the PFC correcting circuit, output circuit is handled in constant current.

Described LED grouping parallel connection is connected again, each group LED in parallel also each and be connected to a Zener diode.

Owing to adopted above-mentioned structure, the utlity model has following advantage:

1, having over-voltage over-current protection, the anti-surge surge protection of start, good EMI handles etc.;

2, have the PFC circuit for rectifying, have higher power factor, improve the utilization rate of whole electrical network;

3, the LED load circuit adopts the matrix form layout, and when one of them or several LED break down, the illumination that can not influence whole light fixture is used, and can reduce light fixture maintenance frequency and cost, prolongs the service life of light fixture.

4, be hinged between lamp socket, support bar, the Cap casing, can rotate up and down, convenient height and the angle of regulating.

Description of drawings

Below in conjunction with accompanying drawing the specific embodiment of the present utility model is described in further detail.

Fig. 1 is the stereogram of LED illuminating lamp;

Fig. 2 is the circuit diagram of drive circuit.

Fig. 3 is the circuit diagram that LED connects.

The specific embodiment

As shown in Figure 1 and Figure 2, LED illuminating lamp described in the utility model, comprise lamp socket 1, support bar 2 and Cap casing 3, described lamp socket 1 is hinged with an end of support bar 2, and the other end of support bar 2 and Cap casing 3 are hinged, and are hinged between lamp socket 1, support bar 2, the Cap casing 3, Cap casing can rotate up and down, convenient height and angle of regulating Cap casing.Described lamp socket 1 is provided with attaching plug 4, is provided with drive circuit in the lamp socket 1, is provided with several LED5 in the described Cap casing 3, and described drive circuit is electrically connected with attaching plug 4, LED5.Attaching plug 4 is passages of the outside power taking of whole light fixture, powers to LED5 behind drive circuit.Lamp switch can be arranged on the lamp socket 1, the work of convenient control light fixture.Described drive circuit comprises that output circuit 10 is handled in overcurrent-overvoltage, start surge protection circuit 6, EMI filter circuit 7, bridge rectifier 8, PFC correcting circuit 9, the constant current of serial connection successively.

Wherein, overcurrent-overvoltage, the negative tempperature coefficient thermistor RH1 of start in the surge protection circuit 6 can prevent that immediate current of boot-strap is too high and burn in the circuit other components and parts; Fuse F1 can ensure circuit under normal operation, and the variation of power network current can not exert an influence to the components and parts of circuit; When input voltage was too high, piezo-resistance VR1 can ensure that circuit is unaffected in operate as normal.

Differential mode capacitor CX1, CX2 in the EMI filter circuit 7, common mode inductance L1 form EMI jointly and suppress circuit, produce interference effect in the time of can suppressing DM EMI signal and common mode and disturb signal to the circuit operate as normal.

Bridge rectifier pipe BG1 in the bridge rectifier 8 changes alternating current into direct current.

Electric capacity EC1 in the PFC correcting circuit 9, electric capacity EC2, diode D1, D2, D3, the resistance R 1 common PFC circuit for rectifying of forming, the power factor of raising entire circuit.

Handle between the output circuit to be provided with capacitor C 1 in PFC correcting circuit and constant current, be used to filter the ripple behind the bridge rectifier.

The U1 that constant current is handled in the output circuit 10 is the constant-current driven chip with PWM function, and the voltage that pin1 can bear can reach 450V.R2 shields, and avoids the impact chip of pulse signal frequency.R4 is an adjustable resistance; play the inductive current detection effect; another important function is when load short circuits; metal-oxide-semiconductor Q1 electric current sharply increases, and pressure drop on the R4 raises, when inductive current reference signal that this signal produces greater than the U1 chip internal; internal protection circuitry starts; the internal comparator upset ends metal-oxide-semiconductor Q1, inactivity output.When power MOS pipe Q1 work ends, the LED load is powered through D4 by the L2 discharge, EC3 plays filter action, and there is constant electric current output at LED+ and LED-two ends.When power MOS pipe Q1 conducting, L2, Q1, R4 form the loop, and there is constant electric current output at LED+ and LED-two ends.Filter capacitor C2 is used for filtering, the operating frequency that resistance R 3 is regulated U1.

As shown in Figure 3, described LED5 is 63, and each LED parameter index is identical, and 63 LED grouping parallel connections are connected again, 9 every group, and totally 7 groups.The in parallel LED5 of each group also each and be connected to Zener diode DZ1, a DZ2, DZ3, DZ4, DZ5, DZ6, DZ7.

When scaling loss appears in one of them or several LED, this is organized other LED operating voltages and will rise, and after also going up Zener diode, can stablize this group load voltage under suitable LED safe voltage condition, can shunt the electric current on the LED of scaling loss simultaneously, make the normally work of safety of other normal LED in this group.During so indivedual LED scaling loss, can not produce significantly influence to the illumination of whole light fixture, so promptly reduce the maintenance cost of light fixture, prolong the service life of light fixture again.

LED takes the connected mode of matrix form, and under constant-current supply drove, the index parameter during the LED operate as normal was 3V/18mA, is lower than LED nominal parameter 3.3V/20mA.Because the characteristic of LED low-power consumption, high illumination, according to test analysis, 3W LED illuminating lamp light efficiency reaches more than the 85lm/w, and its effective illumination is equivalent to the incandescent lamp bulb of 60W, and this low-power LED illuminating lamp can be used for room lighting and decoration fully.

In a word; though the utility model has exemplified above-mentioned preferred implementation; but should illustrate; though those skilled in the art can carry out various variations and remodeling; unless such variation and remodeling have departed from scope of the present utility model, otherwise all should be included in the protection domain of the present utility model.

Claims

1. LED illuminating lamp; comprise lamp socket (1); described lamp socket (1) is provided with attaching plug (4); be hinged with support bar (2) on the lamp socket (1); the other end of support bar (2) is hinged with Cap casing (3); described lamp socket is provided with drive circuit in (1); be provided with LED (5) in the described Cap casing (3); described drive circuit and attaching plug (4); LED (5) is electrically connected; it is characterized in that: described drive circuit comprises the overcurrent-overvoltage of serial connection successively; start surge protection circuit (6), EMI filter circuit (7), bridge rectifier (8); PFC correcting circuit (9), output circuit (10) is handled in constant current.

2. according to the described LED illuminating lamp of claim 1, it is characterized in that: described LED (5) grouping parallel connection is connected again, and each group LED (5) in parallel goes back each and is connected to a Zener diode.