CN2884778Y

CN2884778Y - LED indicator lamp

Info

Publication number: CN2884778Y
Application number: CNU2006200535500U
Authority: CN
Inventors: 苏文立
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-01-06
Filing date: 2006-01-06
Publication date: 2007-03-28
Anticipated expiration: 2016-01-06

Abstract

A LED indicator light, comprising a LED and voltage regulator diode, which is connected with the both ends of the LED in parallel, and the indicator light is connected with a load or the power supply in series. LED anode is connected with one pole of a resistor in series, LED cathode is connected with the anode of the voltage regulator diode and a connecting line is led to be electrode A of the indicator light, and the cathode of the voltage regulator diode is connected with the other pole of the resistor and a connecting line is led to be the other electrode B of the indicator light. The LED, the resistor and the voltage regulator diode are positioned in a shell, the LED is positioned upwards, the top of the shell is transparent, the lower part of the shell is a metal light head, the electrode extends out of the bottom of the light head and is as the anode of the indicator light, the electrode B is connected with the side wall of the light head and is as the cathode of the indicator light, and some insulation materials are filled between the anode and the cathode. The utility model is free from the restrictions on voltage level of the power supply, as well as AC circuit and DC circuit, coupled with its very wide working current, and is very conveniently connected in series with a variety of different types of low-power loads for use, more convenient than the traditional fixed-voltage indicator lights.

Description

LED light

Technical field

The utility model relates to a kind of LED light, particularly a kind of LED light of connecting with load or power supply and using.

Background technology

At present, the indicator light that generally uses in the forceful electric power field mainly contains incandescent lamp bulb and gas discharge bulb.The incandescent lamp bulb power consumption is big, caloric value is high, the life-span is short; Gaseous discharge lamp then brightness is significantly not enough, and both alternative glow colors are fewer.

Therefore LED is widely used in electronic circuit because its operating voltage is low.But present LED light can only use in parallel with load or power supply, makes the user not too satisfied.

The utility model content

The purpose of this utility model be to provide a kind of simple and reasonable, cost is low, pressure drop is low, connect with load or power supply, be suitable for the wide LED light of current range, to overcome weak point of the prior art.

A kind of LED light by this purpose design comprises LED and voltage-stabiliser tube, and its architectural feature is that voltage-stabiliser tube is connected in parallel on the LED two ends, and indicator light is connected with load or power supply

One utmost point of the anode of above-mentioned LED and resistance is connected in series, and the negative electrode of LED is connected with the anode of voltage-stabiliser tube and draws the electrode A that a line is made indicator light, and the negative electrode of voltage-stabiliser tube is connected with another utmost point of resistance and draws another electrode B that a line is made indicator light.

Above-mentioned LED, resistance and voltage-stabiliser tube are encapsulated in the housing, LED is provided with up, case top is the transparent body, lower housing portion is a metallic lamp holder, electrode A is stretched out the positive pole of the bottom of lamp holder as indicator light, electrode B and lamp holder sidewall join as the negative pole of indicator light, are filled with nature of glass insulant between positive pole and the lamp holder.

Above-mentioned lamp holder is socket or screw socket structure.

Above-mentioned load comprises ohmic load and/or small-sized AC-DC relay and/or A.C. contactor and/or little electromagnetic valve coil inductive load and/or capacitive load.

The utility model is not owing to be subjected to the restriction of supply voltage height and AC and DC circuit, add that its operating current is very wide, so the use of can connecting with various dissimilar low-power loads easily, so that it decides the voltage-type indicator light than tradition in the use is more convenient.

The difference of the utility model and common indicator light mainly is: during use, the general and power supply of common indicator light is connected in parallel, and this product directly is connected in the circuit at load place.

The utlity model has advantages such as low in energy consumption, that light efficiency is high, photochromic good, photochromic many, life-span is long.

The utility model is simple and reasonable, cost is low, pressure drop is low, it is wide to be suitable for current range.

Description of drawings

Fig. 1 is the utility model one embodiment circuit connection diagram.

Fig. 2-Fig. 3 is the sectional structure schematic diagram of the utility model use on two kinds of different lamp holders.

Fig. 4-Fig. 6 is applied in three kinds of connection diagrams in the different circuit for the utility model.

Embodiment

Below in conjunction with drawings and Examples the utility model is further described.

Referring to Fig. 1-Fig. 6, this LED light, comprise one of one of ultra-high brightness LED, one of 3.3V/1W voltage-stabiliser tube and 75 Ω-1/16W resistance, one utmost point of the anode of LED and resistance is connected in series, the negative electrode of LED is connected with the anode of voltage-stabiliser tube 5 and draws the electrode A that a line is made indicator light, the negative electrode of voltage-stabiliser tube is connected with another utmost point of resistance and draws another electrode B that a line is made indicator light, sees Fig. 1; LED, resistance 1 and voltage-stabiliser tube 5 are encapsulated in the housing, LED is provided with up, case top is a transparent plastic body 6, lower housing portion is a metallic lamp holder, be respectively to socket type (BA9S type) structure lamp holder 4 or general screw socket type (E10 type) structure lamp holder 3, be filled with nature of glass insulant 2 between positive pole and the lamp holder, see Fig. 2 and Fig. 3, perhaps aforementioned circuit is made printed circuit, directly be packaged in the form of making general indicator light in the insulation crust.During use, LED light general be connected in series less than the load of the rated current of indicator light own, and then be connected on the AC and DC power supply, see Fig. 4-Fig. 6.

When current polarity is that the A end is timing for negative, B end; the voltage-stabiliser tube forward conduction, LED oppositely ends, and voltage-stabiliser tube will flow through the current bypass of indicator light; voltage drop with A, B two ends simultaneously maintains about 0.7V, has protected LED to be unlikely to puncture because of bearing higher reverse voltage effectively.If voltage-stabiliser tube adopts burning voltage U _Z=3.3V, rated disspation P _ZThe voltage-stabiliser tube of=1W, then its maximum stable electric current when rated disspation is: I _Zmax=P _Z/ U _Z=1/3.3=0.3 (A),

For guaranteeing the reliability of work, the operating current upper limit of voltage-stabiliser tube should leave sufficient surplus, so if get the maximum operating currenbt of indicator light be: 1/2 ^*I _Zmax=1/2 ^*0.3=0.15 (A),

Get the burning voltage U of voltage-stabiliser tube _ZThe operating current I of=3.3V, LED _L=15mA, then:

R＝(U _Z-U _L)/I _L≈75(Ω)，

In the formula: U _LBe the forward voltage drop of LED, the U of general ultra-high brightness LED _LFor about 2.2V.

When current polarity is an A end for just, the B end is when bearing, and voltage-stabiliser tube works in the reverse breakdown state, and the pressure drop at its two ends is the burning voltage U of voltage-stabiliser tube _Z, when the electric current I that flows through voltage-stabiliser tube _ZWhen the variation of certain limit is arranged, if ignore the influence of its dynamic electric resistor, U _ZSubstantially remain unchanged, thereby make the electric current that flows through LED: I _Z=(U _Z-U _L)/R is constant substantially, wherein, and U _LForward voltage drop for LED.Therefore, the brightness of LED light is also constant substantially, when the electric current that this means when the load series connection of LED light and various different impedances used or flow through indicator light has in a big way variation, only cause that the electric current that flows through voltage-stabiliser tube ZD in the LED light changes, and the pressure drop of flowing through the electric current of LED and indicator light two ends is constant substantially, so the brightness of indicator light is also constant substantially.

Load above-mentioned can be the inductive loads such as coil of ohmic load, small-sized AC/DC relay, A.C. contactor, little electromagnetically operated valve, also can be the capacitive load shown in Fig. 6.

The operating current of LED light is very wide owing to be connected in series, and has included the use until the ac contactor coil below the 60A can directly be connected with it from midget relay.Through long-term experimental results show that, it can also bear the impact up to the heavy current pulse of 500mA/100mS, can prevent effectively more that so non-resistances such as relay, A.C. contactor from loading on instantaneous large-current when starting to the damage of the LED light that is connected in series.

Because of the indicator light use of connecting with load,, the working limit of indicator light limits the independent of power voltage that uses with load so only being flow through the electric current of indicator light itself.But, under the situation that low-voltage circuit is used, should consider whether can influence the operate as normal of load because of indicator light itself has the pressure drop of 2～3V.In low-voltage circuit, under situation about using less than 24V, the resistance of the 1K Ω/1W that can connect simply in circuit earlier is connected in the circuit and uses.This indicator light is equally applicable to DC circuit, must be correct but connect polarity, and metallic cylinder partly is a negative pole, tip electrodes is anodal, otherwise indicator light does not work.

Among the figure, KA, KB and KC are respectively relay, and HL is a LED light, and PB is for often opening button, and PS is normally closed button, and RL is a resistance, and CL is the capacitance current-limiting device, and ML1 is a power line wherein of control power supply, ML2 is another root power line of control power supply.

Claims

1. a LED light comprises LED and voltage-stabiliser tube, it is characterized in that described voltage-stabiliser tube is connected in parallel on the LED two ends, and indicator light is connected with load or power supply.

2. LED light according to claim 1, it is characterized in that the anode of described LED and a utmost point of resistance are connected in series, the negative electrode of LED is connected with the anode of voltage-stabiliser tube and draws a line and make the electrode of indicator light (A), and the negative electrode of voltage-stabiliser tube is connected with another utmost point of resistance and draws another electrode (B) that a line is made indicator light.

3. LED light according to claim 2, it is characterized in that described LED, resistance and voltage-stabiliser tube are encapsulated in the housing, LED is provided with up, case top is the transparent body, lower housing portion is a metallic lamp holder, electrode (A) stretches out the positive pole of the bottom of lamp holder as indicator light, and electrode (B) joins as the negative pole of indicator light with the lamp holder sidewall, is filled with nature of glass insulant between positive pole and the lamp holder.

4. LED light according to claim 3 is characterized in that described lamp holder is socket or screw socket structure.

5. LED light according to claim 1 is characterized in that described load comprises ohmic load and/or small-sized AC-DC relay and/or A.C. contactor and/or little electromagnetic valve coil inductive load and/or capacitive load.