CN201230391Y

CN201230391Y - Time interval control apparatus for LED road lamp

Info

Publication number: CN201230391Y
Application number: CNU2008200974899U
Authority: CN
Inventors: 王国忠; 续天翔; 程长虹
Original assignee: CHONGQING LONGSTAR OPTO-ELECTRONICS MANUFACTURE Co Ltd
Current assignee: CHONGQING LONGSTAR OPTO-ELECTRONICS MANUFACTURE Co Ltd
Priority date: 2008-01-16
Filing date: 2008-01-16
Publication date: 2009-04-29
Anticipated expiration: 2018-01-16

Abstract

The utility model requests to protect an LED street lamp time-interval based controller and relates to lighting control equipment; the equipment comprises an interval timer, a pulse width modulator, a driver, a switch voltage stabilizing power supply, a power-off reset device, a crystal oscillator and an LED street lamp. The output end of the interval timer is connected with the pulse width modulator to control the modulator to produce pulse with different width according to different time intervals; the output end of the pulse width modulator is connected with the driver; the pulse signal with different width is processed by the driver and outputs LED street lamp control signal, to control the brightness of the LED street lamp, divide 24 hours of a day into a plurality of time intervals; different time intervals produce pulse with different width; the pulse controls a drive circuit to lighten an LED lamp; in this way, the brightness of the LED can be uniformly regulated according to the time. The controller is widely applied to urban road lighting, clearance lighs of buildings and the like.

Description

The LED street lamp is control device at times

Technical field

The utility model relates to a kind of lighting control equipment, relates in particular to a kind of LED lighting control equipment.

Background technology

The LED street lamp has higher optical efficiency and longer life-span than traditional sodium vapor lamp, dysprosium lamp, metal halide lamp etc., therefore has more energy-saving significance, is vigorously advocating under the situation of environment protecting and power-saving when the whole society, and popularizing of it has been a matter of time.But the LED street lamp of use and market sale can not change the whole illumination of adjusting street lamp according to the time at present, perhaps can only singly two control light on and off roughly regulate the whole illumination of highway, cause very uncomfortable visual impact can for like this driver's eyes, cause potential safety hazard, when enter midnight, after midnight the time, the light pollution of too bright street lamp can impact the life of surrounding resident, and energy savings more effectively.

Summary of the invention

At the above-mentioned deficiency of prior art, the utility model has designed a kind of LED street lamp brightness control device, the luminosity of LED is carried out even regulation according to the period in one day.

The technical scheme in the invention for solving the above technical problem is, being divided into the some time section in one day 24 hours, the different periods produces the pulse of different in width, and the pulse control Driver Circuit is lighted the LED lamp, like this, the brightness of LED can obtain regulating quite uniformly.The utility model designs a kind of LED street lamp control device at times, and this device comprises, period timer, pulse width modulator, driver, switching power supply, power-off restoration, crystal oscillator, LED street lamp.The output of period timer connects the pulse that pulse width modulator control pulse width modulator produces different in width according to the different periods, the output of pulse width modulator connects driver, the pulse signal of different in width is through the brightness of driver output control LED street lamp, provide reliable running clock by the high-precision crystal oscillator for the period timer, the control end that power-off restoration partly is connected the period timer automatically resets synchronously for timer provides.

Period timer and pulse width modulator are integrated in the FPGA, constitute the pulse-width modulation code by a series of frequency divider cascades respectively and produce part, 24 hours timing frequency dividers, 24 hours address code generation parts.The pulse-width modulation code produces part, and the pulse-width modulation code of generation is sent into driver and sent into the decoder input respectively through a plurality of gate circuits, the LED street lamp control signal of decoder output different periods of paragraph controller output when MUX is controlled.

The brightness that the utility model is adjusted street lamps according to the different periods in one day can improve the energy saving of LED street lamp greatly, reduces the influence of strong brightness light source near resident, does not need to lay new line, and cost is low, reliability is high, and device is not had specific (special) requirements.

Description of drawings

Fig. 1 LED street lamp brightness control device theory diagram

Fig. 2 period timer and pulse width modulator theory diagram

Fig. 3 LED street lamp driver portion electricity theory diagram

Embodiment

At the drawings and specific embodiments enforcement of the present invention is further described in detail below.

Figure 1 shows that LED street lamp brightness control device theory diagram.This LED street lamp control device at times comprises, period timer, pulse width modulator, driver, switching power supply, power-off restoration part, crystal oscillator.Provide reliable running clock by the high-precision crystal oscillator for the period timer, the output of period timer connects the pulse that pulse width modulator control pulse width modulator produces different in width in the different periods, the output of pulse width modulator connects driver, LED street lamp control signal is exported in the pulse of different in width after the driver drives processing and amplifying, the brightness of control LED street lamp, switching power supply provides power supply for device and LED street lamp, the control end that power-off restoration partly is connected the period timer for timer provide automatically reset synchronous.

The function of period timer, pulse width modulator realizes by extensive programmable integrated circuit FPGA, adopts reliable high-precision crystal oscillator to provide the running clock of fixed frequency for the period timer, and annual departure is no more than 5 seconds.And when outage was turned on light again, all timers can automatically reset synchronously, can fall the error full scale clearance of accumulation.

Be illustrated in figure 2 as period timer and pulse width modulator theory diagram.Period timer and pulse width modulator are synthetic by a series of frequency dividers that are integrated in FPGA inside, comprise, the pulse-width modulation code produces part, 24 hours timing frequency dividers, 24 hours address code generation parts, and each several part is made of a series of frequency divider cascades respectively.

The high accurate clock signal that crystal oscillator produces enters extensive programmable integrated circuit FPGA (can adopt the LC4128T100 of lattice company) back and by a series of frequency dividers it is carried out the frequency division of different systems, the pulse-width modulation code generation part that is made of the 11st, 12,13 frequency divider cascade produces pulse-width modulation code Q0, Q1, Q2, and the pulse-width modulation code is used to produce LED street lamp brightness control signal.24 hours timing frequency dividers among the high-precision crystal oscillator input FPGA, produce hour pulse, 24 hours address codes that are made of last 4 frequency dividers among hour pulse control FPGA produce the part outputs and produce 24 hours address code S0, S1, S2, S3, this address code is for the Port Multiplier in the street lamp brightness control section provides address signal, is chosen in the different periods to produce corresponding pulsewidth.

Be illustrated in figure 3 as LED street lamp driver portion electricity theory diagram, gate circuit I106, I107, I74 output connect the decoder input in the driver, the control impuls of decoder output paragraph controller I19 different periods of output when MUX output control.

The pulse-width modulation code produces imports pulse signal (being the brightness sign indicating number) Y78, Y68, the Y48 that decoder is finished decoding back generation different in width after the pulse-width modulation code Q0, Q1, the Q2 that partly export send into gate circuit I106, I107, I74 shaping respectively.Paragraph controller when pulse signal Y78, Y68, the Y48 of different in width being selected and outputing to by 24 hours address codes control MUX I17, I21, I20, it is assigned to the corresponding time period, the pulse signal of different in width was provided for the different periods, promptly produce different brightness behind the different pulse width signal driving LED street lamps, by changing the connected mode of MUX input, determine each period adopts the pulse of which width, by gate circuit I109 output LED street lamp brightness control signal, after overdriving, light the LED street lamp then.

Claims

1, a kind of LED street lamp is control device at times, this device comprises, the period timer, pulse width modulator, driver, switching power supply, the power-off restoration part, crystal oscillator, switching power supply for the device and the LED street lamp power supply is provided, it is characterized in that, provide clock oscillation by crystal oscillator for the period timer, the output of period timer connects pulse width modulator control pulse width modulator produces different in width in the different periods pulse signal, the output of pulse width modulator connects driver, the pulse signal of different in width is exported LED street lamp control signal after drive processes, the control end that the brightness of control LED street lamp, power-off restoration partly are connected the period timer automatically resets synchronously for timer provides.

2, LED street lamp according to claim 1 control device at times, it is characterized in that, period timer and pulse width modulator are integrated in the FPGA, comprise: the pulse-width modulation code produces part, 24 hours timing frequency dividers, 24 hours address code generation parts, and each several part is made of a series of frequency divider cascades respectively.

3, LED street lamp according to claim 1 control device at times, it is characterized in that, a plurality of gate outputs connect the decoder input in the described driver, the LED street lamp control signal of decoder output different periods of paragraph controller output when MUX is controlled.