CN202005039U - LED device - Google Patents

Abstract

The utility model provides a light-emitting diode device, including a rectification voltage-stabilizing module, a light-emitting diode lamp cluster and constant current module. The rectifying and voltage-stabilizing module is electrically connected with a mains supply and is used for outputting a direct current driving voltage. The light-emitting diode lamp string is formed by connecting a plurality of light-emitting diodes in series, the first end of the light-emitting diode lamp string is electrically connected with the rectifying and voltage-stabilizing module to receive direct current driving voltage, and the constant current module provides stable direct current to drive the light-emitting diode lamp string to emit light. Therefore, the utility model discloses a single constant current source drives the emitting diode lamp cluster and gives out light, except that circuit design is simple and have the lower advantage of cost, compare in the current emitting diode device that multiunit constant current source designed, also have advantages such as less heat energy production and lower power consumption.

Description

Light-emitting diode assembly

Technical field

The utility model is a kind of light-emitting diode assembly, is meant a kind of light-emitting diode assembly with low hear rate especially.

Background technology

Please refer to shown in Figure 1ly, Fig. 1 is the schematic diagram of present existing light-emitting diode assembly.Existing light-emitting diode is with a plurality ofLED light string 11 parallel connections mostly, in parallel with apower supply 10 again, wherein, thispower supply 10 can be an alternating-current voltage source or a direct current voltage source, eachLED light string 11 is made up of many light-emitting diode series connection,power supply 10 is the power supply of a low-voltage supply, and its voltage swing is common between 6～24 volts.

Because allLED light strings 11 are all accepted same voltage when in parallel, under the same voltage in eachLED light string 11 electric current of light-emitting diode but different because of the discreteness of procedure for producing, cause each light-emitting diode luminosity to differ, though the light-emitting diode of same model can have more close brightness, but often because of the fluctuation of production technology causes application in parallel can't be satisfactory, therefore, the chamber of commerce of manufactory of light-emitting diode assembly is connected with a constant current source 12 (being referred to as constant current supply again) in eachLED light string 11 mostly, with the electric current of stable flow, control the luminosity of each light-emitting diode accurately through eachLED light string 11.

But, above-mentionedly a plurality of constantcurrent sources 12 are set control eachLED light string 11 except the raising that causes cost of manufacture, those constantcurrent sources 12 can additionally produce a large amount of heat energy because of power consumption; The problem of heat radiation can directly have influence on the luminosity of light-emitting diode, and is serious, more can significantly reduce the useful life of light-emitting diode.

Therefore, creator of the present utility model is think of, the design team's system of grinding with great concentration because present light-emitting diode assembly can produce the shortcoming of high heat on using, and uses so that the consumption masses to be provided, and desires to grind the creation motivation of wound for the utility model.

Summary of the invention

Because above-mentioned disappearance and creation motivation, creator of the present utility model urgently considers to the greatest extent, develops the utility model finally.

A purpose of the present utility model is to provide a kind of light-emitting diode assembly, reach the effect that reduces the heat energy generation by single constant current source, utilize the constant current sources of organizing to control the problem of organizing LED light strings in parallel more and causing hear rate more to overcome present having now.

In order to achieve the above object, the utility model provides a kind of light-emitting diode assembly, comprising:

One rectifying and voltage-stabilizing module is electrically connected in a mains supply, and an alternating voltage of this mains supply is converted to a direct current driving voltage;

At least one LED light string, respectively this LED light string has one first end and one second end, and respectively the top of this LED light string is connected in this rectifying and voltage-stabilizing module, to receive this driving DC voltage, wherein, this LED light string is connected in series by a plurality of light-emitting diode; And

At least certain current module respectively should be decided current module and be electrically connected between the bottom of this rectifying and voltage-stabilizing module and this respective leds lamp string, and it is luminous to provide a stable DC electric current to drive this LED light string according to this driving DC voltage.

During enforcement, at least one light-emitting diode of this of this LED light string connects with series system.

During enforcement, this rectifying and voltage-stabilizing module comprises:

One bridge rectifier is electrically connected in this mains supply, and this mains supply receives this alternating voltage certainly, and is converted into a pulsed dc voltage;

One filter capacitor, one end of this filter capacitor is connected in this bridge rectifier, the other end of this filter capacitor is connected in an earth terminal, when this pulsed dc voltage is leveled off to downwards zero the time by a peak value, this filter capacitor is kept the enough voltage of this pulsed dc voltage with discharge, drives this LED light string;

One current-limiting resistance, an end of this current-limiting resistance is connected in this bridge rectifier; And

One Zener diode, an end of this Zener diode is connected in the other end of this current-limiting resistance, and the other end of this Zener diode is connected in this earth terminal, in order to the size of the crest voltage value that limits this driving DC voltage.

During enforcement, this is decided current module and comprises:

One current source, an end of this current source is connected in the bottom of this LED light string, and the other end of this current source is connected to this earth terminal; And

One drives electric crystal, comprises a gate pole, a drain electrode and an one source pole, and this gate pole is connected between this current-limiting resistance and this Zener diode, and this drain electrode is connected in the bottom of this LED light string, and this source electrode is connected in this current source.

During enforcement, respectively this light-emitting diode is a white light emitting diode.

According to the disclosed embodiment of the utility model, light-emitting diode assembly comprises a rectifying and voltage-stabilizing module, at least one LED light string and certain at least current module.The rectifying and voltage-stabilizing module is electrically connected in a mains supply, and an alternating voltage (Alternating Current voltage, AC voltage) of mains supply is converted to a direct current driving voltage.LED light string has one first end and one second end, and be connected in series by a plurality of light-emitting diode and formed, first end of LED light string is electrically connected in the rectifying and voltage-stabilizing module, to receive driving DC voltage, deciding provides a stable DC electric current to come the driven for emitting lights diode lamp luster luminous according to driving DC voltage between second end that current module is electrically connected in rectifying and voltage-stabilizing module and LED light string.

Wherein, the quantity of light-emitting diode is with the size of a proportionate relationship corresponding to the alternating voltage of mains supply.

Therefore, according to above-mentioned disclosed structure, light-emitting diode assembly of the present utility model is according to the light-emitting diode of mains supply configuration respective amount, make it be able to come the driven for emitting lights diode lamp luster luminous by single constant current source, except circuit design simply has the lower-cost advantage, compared to the designed light-emitting diode assembly of existing many group constant current sources, also have advantages such as less heat energy generation and lower power consumption.

Description of drawings

Fig. 1 is the schematic diagram of present existing light-emitting diode assembly.

Fig. 2 is the schematic diagram of an embodiment of the utility model light-emitting diode assembly.

Fig. 3 is the circuit diagram of an embodiment of the utility model light-emitting diode assembly.

Fig. 4 is the schematic diagram of another embodiment of the utility model light-emitting diode assembly.

Description of reference numerals: 10-power supply; 11, the 22-LED light string; The 12-constant current source; The 20-mains supply; 21-rectifying and voltage-stabilizing module; The 211-bridge rectifier; 23-decides current module; The 231-current source; The C-filter capacitor; The D-Zener diode; The GND-earth terminal; The R-current-limiting resistance; TR-drives electric crystal.

Embodiment

Below only describe the utility model in detail with embodiment.

Please refer to shown in Figure 2ly, Fig. 2 is the schematic diagram of an embodiment of the utility model light-emitting diode assembly.In this embodiment, light-emitting diode assembly comprises a rectifying and voltage-stabilizingmodule 21, aLED light string 22 and certain current module 23.Rectifying and voltage-stabilizingmodule 21 is electrically connected in amains supply 20, and an alternating voltage (Alternating Current voltage, AC voltage) ofmains supply 20 is converted to a direct current driving voltage.LED light string 22 has one first end and one second end, and be connected in series by a plurality of light-emitting diode and formed, first end ofLED light string 22 is electrically connected in rectifying and voltage-stabilizingmodule 21, to receive driving DC voltage, decide between second end thatcurrent module 23 is electrically connected in rectifying and voltage-stabilizingmodule 21 andLED light string 22, it provides a stable DC electric current to come driven for emitting lightsdiode lamp luster 22 luminous according to driving DC voltage.In present embodiment, light-emitting diode is a white light emitting diode, and the light-emitting diode ofLED light string 22 connects with series system.

Wherein, the quantity of light-emitting diode is with the size of a proportionate relationship corresponding to the alternating voltage of mains supply 20.For instance, it is 110 volts mains supply 20 (as: plug on the wall) that light-emitting diode assembly of the present utility model is applied to one, the crest voltage value of driving DC voltage is under 155 volts the environment, and use a light-emitting diode with operating voltage of 3 volts, thenLED light string 22 can be connected in series 40～45 light-emitting diode, in other words, when the utility model being applied to one when being 220volts mains supply 20 environment, the light-emitting diode quantity thatLED light string 22 is connected in series is 80～90 (quantitatively are equivalent to be applied in 110 volts twice), and above-mentioned proportionate relationship can be reduced to as follows:

N=V_Peak÷ V_Drop, N is the quantity of light-emitting diode, and Vpeak is the crest voltage value of driving DC voltage, and Vdrop is the magnitude of voltage of the operating voltage of single light-emitting diode; And

Vin then is the magnitude of voltage of the alternating voltage of mains supply.

Please cooperate with reference to shown in Figure 3, Fig. 3 is the circuit diagram of an embodiment of the utility model light-emitting diode assembly, and rectifying and voltage-stabilizingmodule 21 comprises a bridge rectifier 211, a filter capacitor C, a current-limiting resistance R and a Zener diode D.Bridge rectifier 211 is electrically connected inmains supply 20, receives alternating voltage frommains supply 20, and is converted into a pulsed dc voltage (Pulsating Direct Current voltage, Pulsating DC voltage).The end of filter capacitor C is connected in bridge rectifier 211, the other end then is connected in an earth terminal GND, in general, and when this pulsed dc voltage is leveled off to downwards zero the time by peak value, filter capacitor C can discharge to keep the enough voltage of pulsed dc voltage, comes driven for emitting lights diode lamp luster 22.The end of current-limiting resistance R then is connected inbridge rectifier 11.

During for the alternating voltage instability (the especially electric power system of backward country) of avoiding Utilities Electric Co. to provide, the voltage drop that causes putting on each light-emitting diode is excessive and damage, the end of Zener diode D is connected in the other end of current-limiting resistance R, the other end of Zener diode D then is connected in earth terminal GND, in order to the size of crest voltage value of restriction driving DC voltage.

Decidecurrent module 23 and comprise that a current source 231 and drives electric crystal TR, one end of current source 231 is connected in second end ofLED light string 22, the other end of current source 231 then is connected to earth terminal GND, drive electric crystal TR and then comprise a gate pole, a drain electrode and an one source pole, gate pole is connected between current-limiting resistance R and the Zener diode D, drain electrode then is connected in the bottom ofLED light string 22, and source electrode then is connected in current source 231.By above-mentioned structure, when pulsed dc voltage increases, Zener diode D has the effect of voltage stabilizing to the gate pole that drives electric crystal TR, so that this gate voltage is fixed on specific size, the technical field of this case has common skill personage and knows, when this gate voltage fixedly the time, the increase of this drain electrode and voltage between source electrodes can make the internal resistance of this driving electric crystal TR increase, the electric current of this drain electrode and voltage between source electrodes and flow through this drain electrode and source electrode presents nonlinear relation, and then reaches the output effect of deciding electric current.

In addition, please refer to shown in Figure 4ly, Fig. 4 is the schematic diagram of another embodiment of the utility model light-emitting diode assembly.In order to allow single light-emitting diode assembly can have higher lumen (Lumen), in present embodiment, light-emitting diode assembly is provided with a plurality of LED light strings parallel with one another 22 and decidescurrent module 23,current module 23 is decided inLED light string 22 series connection, wherein, light-emitting diode in eachLED light string 22 then still links with series system, the light-emitting diode quantity of eachLED light string 22 is corresponding to the voltage swing ofmains supply 20, its both sides relation is same as the previously described embodiments, is then no longer tired out in this and states.

According to above-mentioned disclosed structure, light-emitting diode assembly of the present utility model is according to the light-emitting diode of mains supply configuration respective amount, make it be able to come the driven for emitting lights diode lamp luster luminous by single constant current source, except circuit design simply has the lower-cost advantage, compared to the designed light-emitting diode assembly of existing many group constant current sources, also have advantages such as less heat energy generation and lower power consumption.

But the above, it only is preferred embodiment of the present utility model, when can not be in order to limiting the enforceable scope of the utility model, all know this case field have common skill personage variation and the modification that obviously can do, all should be considered as not departing from flesh and blood of the present utility model.

Claims (5)

1. a light-emitting diode assembly is characterized in that, comprising:

One rectifying and voltage-stabilizing module is electrically connected in a mains supply, and an alternating voltage of this mains supply is converted to a direct current driving voltage;

At least one LED light string, respectively this LED light string has one first end and one second end, and respectively the top of this LED light string is connected in this rectifying and voltage-stabilizing module, to receive this driving DC voltage, wherein, this LED light string is connected in series by a plurality of light-emitting diode; And

At least certain current module respectively should be decided current module and be electrically connected between the bottom of this rectifying and voltage-stabilizing module and this respective leds lamp string, and it is luminous to provide a stable DC electric current to drive this LED light string according to this driving DC voltage.

2. light-emitting diode assembly as claimed in claim 1 is characterized in that, at least one light-emitting diode of this of this LED light string connects with series system.

3. light-emitting diode assembly as claimed in claim 1 is characterized in that, this rectifying and voltage-stabilizing module comprises:

One bridge rectifier is electrically connected in this mains supply, and this mains supply receives this alternating voltage certainly, and is converted into a pulsed dc voltage;

One filter capacitor, one end of this filter capacitor is connected in this bridge rectifier, the other end of this filter capacitor is connected in an earth terminal, when this pulsed dc voltage is leveled off to downwards zero the time by a peak value, this filter capacitor is kept the enough voltage of this pulsed dc voltage with discharge, drives this LED light string;

One current-limiting resistance, an end of this current-limiting resistance is connected in this bridge rectifier; And

One Zener diode, an end of this Zener diode is connected in the other end of this current-limiting resistance, and the other end of this Zener diode is connected in this earth terminal, in order to the size of the crest voltage value that limits this driving DC voltage.

4. light-emitting diode assembly as claimed in claim 3 is characterized in that, this is decided current module and comprises:

One current source, an end of this current source is connected in the bottom of this LED light string, and the other end of this current source is connected to this earth terminal; And

One drives electric crystal, comprises a door-plate, a drain electrode and an one source pole, and this gate pole is connected between this current-limiting resistance and this Zener diode, and this drain electrode is connected in the bottom of this LED light string, and this source electrode is connected in this current source.

5. light-emitting diode assembly as claimed in claim 1 is characterized in that, respectively this light-emitting diode is a white light emitting diode.

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