CN202852459U - LED fluorescent lamp with external driving power supply - Google Patents

Abstract

The utility model relates to an LED fluorescent lamp with an external drive power supply, which is characterized in that: the LED fluorescent lamp tube is composed of an LED light source board, an LED fluorescent lamp tube shell, connectors at both ends of the lamp tube and connecting wires; the LED lamp light source board is installed Inside the shell of the LED fluorescent tube; the chips of the LED lamp light source board are connected in series, and the forward voltage drop of the LED lamp chips after series connection is close to the stable high-voltage DC voltage value of the external drive power supply; the LED lamp A full-wave bridge rectifier circuit is installed on the light source board; the LED light source board is equipped with a constant current circuit, which directly drives the LED light source after the stable high-voltage DC voltage constant current; the LED fluorescent tubes can be multiple The lamps share an external drive power supply.

Description

The LED fluorescent lamp that a kind of driving power is external

Technical field

The utility model relates to the LED lighting field, relates in particular to the external LED fluorescent lamp lighting light fixture of a kind of driving power.

Background technology

The LED fluorescent lamp driving power supply divides two kinds of built-in and externals, driving power external LED fluorescent lamp generally adopts low-voltage dc power supply to drive, and the power supply service efficiency is not high, clear and upright/negative wiring that the fluorescent tube wiring must divide, the LED fluorescent lamp otherwise point does not work, even can damage the LED fluorescent tube;

Using must be careful when installing, and the user accidentally receives on the daylight lamp tray of original use civil power, and the high pressure civil power is bound to burn out the LED fluorescent tube;

The driving power constant voltage current value disunity of each LED fluorescent lamp lighting manufacturer design, the versatility of LED fluorescent tube is very poor, a kind of driving power connects the LED fluorescent tube of different manufacturers, want LED fluorescent tube point not work, want just to burn out the LED fluorescent tube, bring unnecessary loss to the user;

Above problem is unfavorable for popularizing the novel LED illumination of environmental protection, is vast electronic engineering technical staff's urgent need to solve the problem.

The utility model content

Core technology of the present utility model is: by external stable HVDC driving power driving LED fluorescent lamp, the galvanostat circuit of described LED fluorescent lamp, the stable high voltage direct current driven led light source chip that provides; The LED fluorescent structure is simple, and fluorescent tube can adopt overall plastic structure, is conducive to reduce the cost of LED fluorescent lamp, is conducive to popularize the LED illumination;

On the LED fluorescent light source plate bridge rectifier circuit can be installed, make the wiring of LED fluorescent tube regardless of positive negative wire, install and use easily; The user is connected to former using on the common fluorescent tube dish of civil power to the LED fluorescent tube because of carelessness, equally can light, and can be not damaged;

On the LED fluorescent light source plate galvanostat circuit can be installed, be connected with described rectifier circuit output, the direct current driven led light source chip that galvanostat circuit output is constant;

Described bridge rectifier circuit and galvanostat circuit also can be arranged separately on the PCB, and this PCB is placed in the back side of the light source chip of described LED fluorescent light source plate, are electrically connected with light source chip on the LED fluorescent light source plate with electric wire.

Utility model solves the technical scheme that its technical problem adopts:

The LED fluorescent lamp that a kind of driving power is external comprises:

LED fluorescent light source plate: be used for installing the led light source chip, adopt the low-voltage LED light source chip tandem compound more than tens of to form, the forward voltage depreciation of led light source chip of series connection, should close to and be not more than the magnitude of voltage of external stable HVDC driving power;

Bridge rectifier circuit: formed by integrated circuit rectifier bridge or discrete commutation diode, the bridge rectifier input is electrically connected with described external stable HVDC driving power output, bridge rectifier output and described galvanostat circuit be connected the led light source chip and be connected;

Galvanostat circuit: formed by semiconductor constant current diode or constant current triode or integrated constant current IC or electronics discrete component constant-current circuit; Described galvanostat circuit input is connected with described bridge rectifier output, and the galvanostat circuit output connects described led light source chip, and the DC current of galvanostat circuit output directly drives and lights the led light source chip;

The fluorescent tube shell: it is the aluminum hull heat radiation that the shell of fluorescent tube can adopt half, and half is the transparent plastic bright dipping; Also can adopt overall plastic structure, described LED fluorescent lamp driving power supply adopts external driving power, reduces the caloric value of LED fluorescent tube inside;

Two end connectors and connecting line: described LED fluorescent lamp is connected with external power supply by two end connectors, is connected with two input wires of the bridge rectifier of described LED fluorescent light source plate by conductive connecting or contact pin.

Described bridge rectifier circuit and galvanostat circuit, can be directly installed on the same face of the described led light source chip on the described LED fluorescent light source plate, also can be directly installed on the back side of described LED fluorescent light source plate, also can be arranged separately on the PCB, PCB is placed in the back side of the led light source chip of described LED fluorescent light source plate, is electrically connected with the led light source chip of LED fluorescent light source plate with electric wire.

External driving power is stable HVDC driving power, described external stable HVDC driving power output is connected to two end connectors of described LED fluorescent lamp, and the galvanostat circuit of fluorescent lamp inside provides the high-voltage direct current of continous-stable to drive and lights described led light source chip; At this moment the magnitude of voltage of described external stable HVDC driving power can close to or be higher than the virtual value of this territory of use's line voltage, but the led light source chip forward voltage values after the series connection approaches and is not higher than the magnitude of voltage of described external stable HVDC driving power; There is bridge rectifier circuit LED fluorescent lamp inside, can be regardless of positive and negative during two end connector wiring of described external stable HVDC driving power and described LED fluorescent lamp; When adopting external stable HVDC driving power, the DC current that drives described led light source chip be stablize, continuous continual current work state.

The bridge rectifier circuit of the LED fluorescent lamp that described a kind of driving power is external and galvanostat circuit can not use electrolytic capacitor and electronics high frequency transformer, to eliminate electrolytic capacitor short problem in service life, to get rid of the problem of the heating of electronics high frequency transformer and generation High-frequency Interference.

Described LED fluorescent tube more than one can share same described external stable HVDC driving power.

The LED fluorescent lamp that described driving power is external can comprise whole described features, also can be to comprise the described feature of part, and described driving power external LED fluorescent structure principle also can be used for other LED lighting lamp structure devices.

Description of drawings

Fig. 1 is embodiment of the utility model, the LED fluorescent lamp basic circuit diagram that a kind of driving power is external;

Fig. 2 is embodiment of the utility model, the LED fluorescent lamp basic circuit diagram that directly drives with civil power;

Fig. 3 is embodiment of the utility model, a kind of assembling schematic diagram of LED fluorescent light source plate.

The specific embodiment

By describe in detail technology contents of the present utility model, as a result feature, realized purpose and effect, below in conjunction with embodiment and cooperate accompanying drawing to give in detail explanation.

With reference to figure 1, embodiment of LED fluorescent lamp that a kind of driving power described in the utility model is external is characterized in that:

Make driving power with external stable HVDC driving power 3, be connected to the input of described LED fluorescent lamp 6, the galvanostat circuit 4 of fluorescent lamp inside provides the high-voltage direct current of continous-stable to drive and lights described led light source chip 5; At this moment the magnitude of voltage of external stable HVDC driving power 3 can close to and be not higher than the amplitude of this territory of use's line voltage 1, but the forward voltage values of the led light source chip 5 of tandem compound should close to and be not higher than the output voltage values of described external stable HVDC driving power 3; There is bridge rectifier 2 LED fluorescent lamp 6 inside, can be regardless of positive and negative when external stable HVDC driving power 3 and described LED fluorescent lamp 6 wiring; When adopting external stable HVDC driving power 3 to drive, the DC current that drives described led light source chip 5 be stablize, continuous continual current work state, the light efficiency of LED fluorescent lamp 6 is stable.

With reference to figure 2, embodiment of LED fluorescent lamp that a kind of driving power described in the utility model is external is characterized in that:

After described bridge rectifier 2 is rectified entirely, send described galvanostat circuit 4 constant currents with civil power 1 (input AC sinusoidal voltage), provide high-voltage direct current directly to drive described led light source chip 5; The forward voltage drop value of used led light source chip 5 should close to and be not higher than the amplitude of the used line voltage 1 in this area.

With reference to figure 3, embodiment of LED fluorescent lamp that a kind of driving power described in the utility model is external is characterized in that:

Led light source chip 5, bridge rectifier 2, galvanostat circuit 4 are installed on the LED fluorescent lamp substrate 7, reach the lead contact 8 and 9 that is connected with external power supply; Described bridge rectifier 2 and galvanostat circuit 4 are installed in respectively the two ends of LED substrate 7, also can be installed on other suitable positions, only otherwise affecting sending of led chip light gets final product; The output of external stable HVDC driving power and lead contact 8 are connected logically with being connected, and described stable HVDC driving power provides galvanic current stream to drive and lights led chip 5 through bridge rectifier 2 and galvanostat circuit 4 constant currents.

Being wherein a kind of version in the mounting means with reference to figure 3, is not to be to limit as mounting structure of the present utility model.

Although more than described the specific embodiment that illustrates more of the present utility model, but those of ordinary skill in the art is to be understood that, these only illustrate, and can make various changes or modifications to these embodiment, and not deviate from principle of the present utility model and essence.Scope of the present utility model is only limited by appended claims.

Above embodiment illustrates the utility model, but not as restriction of the present utility model, as long as in connotation scope of the present utility model, all will drop in claims scope of the present utility model variation, modification, the change of above embodiment.

Claims (5)

1. An LED fluorescent lamp with an external drive power supply, characterized in that: An LED fluorescent lamp with an external drive power supply, comprising: LED fluorescent light source board: used to install LED light source chips, which are composed of dozens of low-voltage LED light source chips in series. The forward voltage drop value of the series-connected LED light source chips should be close to and not greater than the external stable high-voltage The voltage value of the DC drive power supply; Bridge rectifier circuit: composed of an integrated circuit rectifier bridge or discrete rectifier diodes, the input end of the bridge rectifier is electrically connected to the output end of the external stable high-voltage DC drive power supply, and the output end of the bridge rectifier is connected to the constant current device circuit Connect with the LED light source chip; Constant current circuit: composed of semiconductor constant current diodes, constant current triodes, integrated constant current ICs, or electronic discrete component constant current circuits; the input end of the constant current circuit is connected to the output of the bridge rectifier, and the constant current The output end of the galvanometer circuit is connected to the LED light source chip, and the DC current output by the galvanostat circuit directly drives and lights up the LED light source chip; Fluorescent tube shell: half of the shell of the fluorescent tube can be made of aluminum for heat dissipation, and half of which can be made of transparent plastic to emit light; it can also adopt an all-plastic structure, and the drive power of the LED fluorescent lamp adopts an external drive power supply to reduce the heat generation inside the LED fluorescent tube ; Two-end joints and connecting wires: the LED fluorescent lamp is connected to the external power supply through two-end joints, and connected to the two input wirings of the bridge rectifier of the LED fluorescent lamp light source board through conductive connecting wires or pins. the 2. A kind of LED fluorescent lamp with an external drive power supply as claimed in claim 1, characterized in that: The bridge rectifier circuit and the constant current circuit can be directly installed on the same surface of the LED light source chip on the LED fluorescent lamp light source board, or can be directly installed on the back of the LED fluorescent lamp light source board, or Separately installed on a PCB, the PCB is placed on the back of the LED light source chip of the LED fluorescent light source board, and electrically connected with the LED light source chip of the LED fluorescent light source board with wires. the 3. A kind of LED fluorescent lamp with an external drive power supply as claimed in claim 1, characterized in that: The external drive power supply is a stable high-voltage DC drive power supply, the output end of the external stable high-voltage DC drive power supply is connected to the connectors at both ends of the LED fluorescent lamp, and the constant current circuit inside the fluorescent lamp provides continuous and stable high-voltage DC current drive Light up the LED light source chip; at this time, the voltage value of the external stable high-voltage DC drive power supply can be close to or higher than the effective value of the mains voltage in the area of use, but the forward voltage value of the LED light source chip after series connection It is close to but not higher than the voltage value of the external stable high-voltage DC drive power supply; there is a bridge rectifier circuit inside the LED fluorescent lamp, and the external stable high-voltage DC drive power supply can be connected to the connectors at both ends of the LED fluorescent lamp. There is no distinction between positive and negative; when an external stable high-voltage DC drive power is used, the DC current driving the LED light source chip is in a stable, continuous and uninterrupted current working state. the 4. An LED fluorescent lamp with an external drive power supply as claimed in claim 1, characterized in that: The bridge rectifier circuit and the constant current device circuit of the LED fluorescent lamp with an external drive power supply may not use electrolytic capacitors and electronic high-frequency transformers, so as to eliminate the problem of short service life of electrolytic capacitors, and to eliminate the heating and cooling of electronic high-frequency transformers. Problems with high-frequency interference. the 5. A kind of LED fluorescent tube with an external drive power supply as claimed in claim 1, characterized in that: More than one LED fluorescent tube can share the same external stable high-voltage DC drive power supply. the

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