CN103687233A - Pulse-width-adjustment automatic dimming LED illuminating lamp driven by constant-current power supply - Google Patents

Abstract

Provided is a pulse-width-adjustment automatic dimming LED illuminating lamp driven by a constant-current power supply. A constant-current driver is in serial connection with a timing module and a pulse width adjustment module and is in serial connection with a luminous panel through pulses of the pulse width adjustment module, and the output pulse width of a pulse width adjusting device is controlled through a timer circuit. When the pulse width output by the pulse width adjusting device is wide, the average work voltage of a light-emitting diode is high, and the LED lamp is bright; when the pulse width output by the pulse width adjusting device is narrow, the average work voltage of the light-emitting diode is low, and the LED lamp is dark; accordingly, the automatic dimming function of the LED lamp is achieved.

Description

A kind of LED illuminating lamp with an automatic light meter of constant-current supply pulse-width regulated formula

Technical field

The present invention relates to a kind of LED illuminating lamp with an automatic light meter of constant-current supply pulse-width regulated formula.

Technical background

LED illuminating lamp as the 4th generation lighting with the strong advantage of the many durabilities of its power saving, capture rapidly lighting market.As the driving power of driving LED illuminating lamp work, on market, be that to take constant-current driving power supply and capacitance-resistance driving power be main flow.But no matter constant-current driving power supply, capacitance-resistance driving power, they do not possess automatic dimming function.Like this, in the second half of the night when, as the light fixture of street lamp, one comes vehicle and pedestrian on road all rare, and lamp is in the same old way vehement bright, obviously there is no need, and can cause the waste on electric energy; Two come that line voltage distribution is very high after midnight, sometimes surpass rated voltage, can work the mischief to light fixture.

Summary of the invention

The LED illuminating lamp with an automatic light meter of a kind of constant-current supply pulse-width regulated of the present invention formula, utilizes adjustable pulse generator, and the driving power of the LED illuminating lamp of two kinds of operating modes is provided.When lamp is started working, first allow LED lamp be operated in vehement bright operating mode, after timing of LED lamp work, automatically light is changed into dark bright state, do not affecting under the prerequisite of illumination, allowing LED illuminating lamp on energy-conservation basis, save again more than 40% electric energy.

A LED illuminating lamp with an automatic light meter for constant-current supply pulse-width regulated formula, its circuit structure is comprised of constant-flow driver circuit, timer and light adjusting circuit.

Accompanying drawing explanation

Accompanying drawing is a kind of circuit theory diagrams of LED illuminating lamp with an automatic light meter of constant-current supply pulse-width regulated formula.

Embodiment

As shown in drawings, IC3 is constant-flow driver module, itsinput termination 220V AC power, and output divides two-way, a road sending and receiving optical diode string, another road connects regularly Drive Module.

As shown in drawings, IC1 and peripheral circuit form timing dimming circuit.R1 is current-limiting resistance, the lower voltage of galvanostat output, is the working power that suitable voltage value is supplied with IC1 chip.

IC1 is that model is CD4060 chip, the R6 that 12 ends connect, C3 are electrifying self-resetting circuit, at IC1, obtain moment R6, a positive pulse of C3 circuit output of power supply, IC1 is resetted and counting beginning, the 3 end output low level voltages of IC1 now, the triode T2 of positive-negative-positive becomes conducting from cut-off, and relay J obtains electric adhesive, the action of corresponding normally-open normally-close contact, is devoted oneself to work by the electrical equipment of its control.

As shown in drawings, 9,1,110 ends of IC1 are timer counter elements, select suitable value just can obtain required timing.

The 10 end A of IC1 are diverter switches of two sections of timings.When A disconnects, timing is long; When A is closed, timing is short.Choose the value of R7, R8, the timing that meets winter, summer is set.

As shown in drawings, IC2 is pulse width modulation circuit, resistance R 2, R3, R4 that 7 ends of IC2 connect, normally-open normally-close contact J by relay J controls, the different connections that change R2, R3, R4, just can obtain the different average output voltage of 3 ends of IC2, thereby reach light modulation object.

As shown in drawings, the normally opened contact J of relay contact J is closed, and when normally-closed contact J disconnects, the average voltage ofoutput 3 outputs of IC2 is high, and the light of the luminous plaque string that the LED driving power of pulse-width-modulating type connects is vehement bright; The normally opened contact J of relay J disconnects, and when normally-closed contact J is closed, the average electrical ofoutput 3 outputs of IC2 is forced down, and the dark lighting of the luminous plaque string that the LED driving power of pulse-width-modulating type connects is bright, thereby reaches object with an automatic light meter.

Claims (5)

1. a LED illuminating lamp with an automatic light meter for constant-current supply pulse-width regulated formula, its circuit structure is comprised of constant-flow driver circuit, timer circuit, pulse width modulation circuit and light-emitting diode serializer circuit.

2. the LED illuminating lamp with an automatic light meter of a kind of constant-current supply pulse-width regulated formula according to claim 1, its special card is: IC3 is the LED driver module of selling on LED lantern fair field, and watt level is by the power decision of lamp kind and lamp.

3. the LED illuminating lamp with an automatic light meter of a kind of constant-current supply pulse-width-modulating type according to claim 1, its special card is: IC1 is timer circuit, IC1 is model C D4060, the external circuit of its 12 pin is electrifying self-resetting circuit, 9,10 and 11 pin are regular time parameter element, select suitable component parameters can meet required timing.

4. the LED illuminating lamp with an automatic light meter of a kind of constant-current supply pulse-width regulated formula according to claim 1, its special card is: IC2 is pulse width modulation circuit, the model of IC2 is NE555, what its 7 pin was external often opens and normally closed relay contact J, control the length of pulsewidth, thereby 3 pin output HIGH voltage and the low-voltages that make IC2, realize function with an automatic light meter.

5. the LED illuminating lamp with an automatic light meter of a kind of constant-current supply pulse-width regulated formula according to claim 1, its special card is: it is the chip of 1W that light-emitting diodes pipe string is selected monolithic power, circuit is the many also forms of 7 strings, the positive pole of light-emitting diode connects the positive pole of constant-current supply, and negative pole connects the collector electrode of the triode T1 on the 3 end outputs of IC2.

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